An overnight train journey from Southampton to London in a business class compartment is where the film's two protagonists, complete strangers to each other, meet, talk and decide to kill each other's wife in order to rid each other of the hell that they are trapped in.
The claustrophobia of the space of the compartment, and the fact that these two are not juxtaposed with each other, but somehow meant to be there together, is both an exciting, yet a repulsive, situation.
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 a bad example but never an ideal.
Their conversations are interspersed with flashbacks which reveal essential clues into these complex yet real characters. It is this time when we see the trauma that Rai was living through after his son's untimely death, and his wife, Nandini's, subsequent insanity.
On the other hand is the beautiful relationship between Rahul & Preity that starts on an almost fantastical note with a hopeful Rahul and a loving Preity but has nearly ended with Priety turning cold towards him because of his obsessive ranting after the collapse of his career. They are virtually living under the same roof now as STRANGERS.
Every moment between Rai and Rahul adds a piece to the big jigsaw puzzle, and we see how every character is playing a game wits with each other, a game that has to be won at all costs to ensure their individual survival.
The second half of the film is about laying the cards out in the open where deceitful acts play on their collective conscience forever from where emerges the backdrop of a thriller of two sincere, yet flawed, love stories.