An overnight journey, from Southampton to London , in a business class compartment is the premise where two of the film's protagonists, complete strangers, to each other, meet, talk and decide that they would kill each other's wife to rid each other of the hell they are trapped in.
Mr.Rai is a successful management giant, who on the face of it, is leading the life that everybody dreams of; Rahul, the flamboyant writer with a flop career is an existence that can only be an example but never an ideal.
Their conversations are interspersed with flashbacks, which reveal essential clues into these complex yet real characters.
It is at this time when on one hand, we see the trauma that Rai was living through after his son's untimely death and his wife Nandini subsequent insanity.
On the other hand is the beautiful relationship between Rahul and Preity that starts on an almost fantastical note with a hopeful Rahul and a loving Preity and ends with Preity turning cold towards him because of his obsessive ranting after the collapse of his career and their ending up living under the same roof as strangers.
What follows is deceit and living by the instinct for all of them. An act that would play on their conscience forever and yet is the only possible way to eliminate the reason that would keep them apart.
But their plan takes ugly twists against a backdrop of a thriller, which becomes a building block of two sincere and complete love stories.