SAN FRANCISCO, USA - 5 MINUTES BEFORE IT HAPPENED: we segue to a couple parking their car in an underground airport garage. The husband, Lee, surreptitiously watches a football game on his H+, upsetting his wife Julie who wants him to drive safely. Their domestic squabble is interrupted by a bizarre spectacle throwing their world into chaos.

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SAN FRANCISCO, USA - 15 SECONDS AFTER IT HAPPENED: Julie and Lee stand shocked at the sudden chaos surrounding them in the lot and then risk a similar fate as Lee goes to aid the fallen people. A mysterious bearded man in glasses, Kenneth, appears and leads a small group down to Level 6, where he insists they're safe. But some in the group are skeptical of their hero and, namely, his theory for what has just happened.

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HELSINKI, FINLAND - 7 YEARS BEFORE IT HAPPENED: a young man, Topi, enters a bar to meet a woman named Manta, who he has chatted with online. Manta plays mysterious, giving Topi a hard time, but Topi may have secrets of his own.

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SAN FRANCISCO, USA - 1 MINUTE AFTER IT HAPPENED: with a small group from Level 6 of the parking structure, Kenneth takes Lee's body to a van to get out of the water from the sprinkler system with the hope he may be able to save him

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MUMBAI, INDIA - 5 MONTHS BEFORE IT HAPPENED: Breanna, a hard-charging technology executive, and her husband Connal (both Irish) meet with a doctor, Gurveer, and a young woman, Leena (both Indian), to arrange a surrogate pregnancy. When the introductory meeting turns into something more like an interrogation and Breanna leaves to continue a work call on her H+, Connall tries to make a more human connection.

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ORIA, ITALY - 2 YEARS AFTER IT HAPPENED: in a desolate village, Matteo tries to help a man injured in an accident, but realizes getting the medicine he needs will not be easy.

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MUMBAI, INDIA - 5 MONTHS BEFORE IT HAPPENED: Gurveer prepares to implant H+ in Leena so the parents can track her pregnancy from abroad: she's anxious and asks many questions about the process. Gurveer, who tells her his own body is not compatible with H+, tells her she is lucky...though something else is commanding his attention.

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SAN FRANCISCO, USA - 45 MINUTES AFTER IT HAPPENED: Kenneth races to save Lee's life with spare wiring and circuit boards, against the objections of Francesca, a soon to be a board-certified neurologist, who can't believe what she's seeing.

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HELSINKI, FINLAND - 7 YEARS BEFORE IT HAPPENED: Topi, now in a physical relationship with Manta, goes to a crime scene which is technically out of his office's jurisdiction. His boss holds him back, but a look at the victim offers a tantalizing clue.

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SAN FRANCISCO, USA - 50 MINUTES AFTER IT HAPPENED: Kenneth tells the small group to plan for a week below, and tries to stop an angry survivor from leaving, only to be accused of being a terrorist. Just as he needs good news, he's pulled away to examine Lee whose condition has changed.

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HELSINKI, FINLAND - 7 YEARS BEFORE IT HAPPENED Topi and Manta hike, sharing a growing intimacy - but Manta won't reveal anything about a particular subject.

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SAN FRANCISCO, USA - 20 HOURS AFTER IT HAPPENED In a quiet moment, Francesca asks to get the truth from Kenneth, how he knows so much about H+. Meanwhile in the airport above a group searches for Kenneth.

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Porland, Oregon, USA - 5 years before it happened Breanna, after pitching her new software venture to a corporate boardroom, later privately meets with a younger, clean-shaven Kenneth to offer an opportunity.

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San Vito, Italy - 2 years after it happened Someone with an interface observes Matteo outside the gates of a base. Later, Matteo returns home and has a flash of insight.

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Mumbai, India - 3 months before it happened In a conference with Dr. Gruveer, Leena is asked to adjust her sleep schedule to match Breanna's work demands. Strangely, Gurveer's attention seems divided.

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San Francisco, USA - 2 days after it happened Brian, a young boy, finds his mother in the parking structure and describes the chaotic world above, and Kenneth gives him a special assignment.

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Helsinki, Finland - 7 years before it happened Drunk, Topi stumbles onto a fragment of a conversation online and is suddenly messaged by Manta, who he meets at their bar for a surprising exchange.

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Oria, Italy - 2 years after it happened Matteo experiences a vision and is awoken from his trance by someone he has been close to but never met, standing in the rain

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Mumbai, India - 1 month before it happened Through H+, Connal shows Leena more personal parts of his life - their connection grows deeper.

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Oria, Italy - 2 years after it happened As Matteo gases up his car for a trip that will take a week, he prepares a young man to lead when he's gone...while making other preparations with his passenger.

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Dublin, Ireland - 4 years before it happened Just before Kenneth leaves to visit the human trials of H+ in South America, Breanna feels there is something he needs to hear.

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Southern Italy - 2 years after it happened Matteo and his passenger come to a roadblock with armed thugs. She makes a quick plan and gives Matteo explicit instructions.

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Dublin, Ireland - 3 weeks before it happened As we see what Connal sees through his connection, Breanna grows suspicious of all the time he spends on his H+.

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San Francisco, USA - 1 week after it happened Finally out of the parking structure, Kenneth needs to lead his people out of the reception area for H+ but Jason holds him at gunpoint. However Kenneth holds an advantage Jason wasn't counting on.

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Tierra del Fuego, Chile - 4 years before it happened Kenneth visits the South American lab where the H+ technology is being synthesized onto the map of the human mind, and views the first test subject: someone we know well.

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Brazzaville, Republic of Congo - 1 year after it happened Topi flees a young African soldier following him - only to find an unlikely ally.

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Oria, Italy - 3 months before it happened Matteo, in priestly robes, faints as he meets Simona in his church - when he wakes he blames it on his body adapting to his new H+. In the pew, he tries to make a personal connection with Simona, who confesses to visions past and future.

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Northern California, USA - 2 weeks after it happened As Francesca and Simona reconnect in the cabin, Kenneth preps Anthony for what to do while he's gone: he's planning a dangerous journey with a critical goal.

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Dublin, Ireland - 3 years before it happened After skipping his own party, Breanna seeks out Kenneth at his apartment. Kenneth reveals why he's been on edge.

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MUMBAI, INDIA - 7 MONTHS AFTER IT HAPPENED Gurveer tries to convince his superior of an important next step with the child.

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LONDON, UK - 9 YEARS BEFORE IT HAPPENED In an underground medical experiment, a figure presses a nervous Gurveer to bring his new implanted chip to full power on an unlikely test subject.

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Dunbara, Republic of Congo - 1 year after it happened Topi and the young soldier search for Dunbara - a village burned to the ground long ago. They find the area and dig; Topi knows what he is looking for...

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Northern California, USA - 3 years before it happened Jason and his fringe political clan of neo-Luddites have raised the stakes and kidnapped an enemy to their cause...and let him know what they want from him.

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Mumbai, India - 8 months after it happened In the post-disaster India, Gurveer visits Leena's small village with one goal in mind, and encounters a reaction he doesn't expect.

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Northern California, USA - 3 years before it happened Kenneth has a dream and wakes with an insight that drives him to alert someone immediately.

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Southern Alberta, Canada - 8 months after it happened Working with Simona, Kenneth struggles to set up a familiar network.

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New York, USA - 8 years before it happened Jason wants a fair settlement for the harm caused him by LPW, a biotech firm. The LPW lawyer interprets things differently.

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Rome, Italy - 2 years after it happened Topi reaches the base and finds a clue: a message from Manta meant only for him.

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Dunbara, Republic of Congo - 7 years before it happened Peters and Gurveer negotiate with a remote African chief, promising, "When you see what it can do for you and your tribe, you'll realize money is nothing in comparison."

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Rome, Italy - 2 years after it happened Manta, having hallucinations, reaches out to Matteo for help. She says she doesn't need him to be a priest, but wants him to listen to her confession.

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Oria, Italy - 3 months before it happened Concealing his H+ connection from Jason and the neo-Luddites, Kenneth forms a plan a continent away.

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Yozgat, Turkey - 1 year after it happened Riding with Gurveer and baby Vadish in the back seat, Leena connects with Connal for the first time in a year...and reaches an unsettling discovery.

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Northern California, USA - 2 weeks before it happened While rallying his troops, Jason's mechanical body brace gives out and he is unable to move his arms and legs. He turns to someone he considers a trusted friend for help.

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Southern Alaska, USA - 1 year after it happened Kenneth, Simona and Francesca reach the Alaska Data Center, but there is a surprise waiting for them there.

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Hamburg, Germany - 3 years before it happened Topi chases Manta into a German subway station desperate to have her hear his one plea.

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The Vatican, Italy - 2 years after it happened Topi crashes into where Gurveer is hiding with Vadish...he carries a desperately sick Manta. Gurveer knows what is causing Manta such pain.

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Western Ireland - 30 minutes before it happened Breanna's relationship with Connal reaches a breaking point, as secrets past and present are unearthed.

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Our world - when it happened At the data center, Kenneth has something else up his sleeve for Jason. In a flashback to the moment of the massive virus attack, we find clues to the deeper cause.

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