Sonam will only be with a guy who is a virgin and Jith will do whatever it takes for him to have his first time with a girl. So when Sonam invites Jith to live together for a month to test their compatibility, he sees all his naughty & romantic dreams coming true. But once inside the mysterious house, he realises that nothing is going to go as per his plans! Sonam refuses to entertain his advances, no matter how much he tries. However, there is someone else in the house, a beautiful young someone, who falls for Jith and is willing to do anything to win his heart.

Jith is in a tough spot. He is desperate to get close to Sonam who is refusing to be impressed by any of his romantic gestures. Additionally the other mystery girl is playing her own tricks, very successfully, to ensure Sonam and he cannot get together.Meanwhile, Rathinam, Sonam's over-possessive cousin, who has wanted Sonam for himself, hires an out-of-work detective Maruvesha Marikose, to keep an eye on Jith and to protect Sonam even against her own wishes.With none of his schemes working right, Jith decides to change tactics and befriends the other girl who is called Monalisa and is a ghost.

As if Monalisa alone wasn’t enough to create issues between Jith and Sonam, Monalisa's lover, another ghost comes into the picture. Things get really difficult for Jith when the ghost lover starts hitting on Sonam. Every attempt made by Jith keeps failing and Sonam just cannot be won over.

Things take a turn when Sonam confronts a local thug and also slaps him in broad daylight. Looking for revenge, the thug returns and kidnaps Sonam. Now Jith must turn to his friendly ghost Monalisa for help. Will she?

Once back at the mansion, the games continue. A desperate Jith tries all the tricks in the book with Sonam while Monalisa uses her sinister humour and supernatural abilities to foil his well laid plans. Worried that he will lose Sonam, Jith hires a five star rated exorcist; Jadamudi Janga, to wipe out the ghost playing games with his sex life. Meanwhile Detective Marikose is keeping tabs on all that is happening.

Janga manages to trap Monalisa in a jar and warns Jith that if she ever manages to escape from the jar, it would be very difficult to control the demon again. What follows is a series of mishaps and errors, with Monalisa escaping the jar and Jith finally losing his virginity but not in a way he would have wanted to.