Saahil (Emraan Hashmi), 27, runs a travel agency with a friend Patel in the U.K. which undertakes traveling and sight seeing in and around U.K... but he is on the verge of shutting it down because of non payment of loans taken while starting this agency. He sometimes cons his customers and clients to make some extra money. Reason? his mother, who is the only family he has in this foreign land since he was 12 years old, is suffering from multiple renal disorders and is on the verge of dying in the hospital.
As life goes on in the midst of trying to arrange for sums to save his mother?s life, enters Neha (Geeta Basra), 22, who is on a holiday tour with her family. They book Saahil?s travel agency to guide them in and around U.K. for sight seeing. Neha is full of life, simple, charming and very caring. Saahil takes them on trips around London and both Neha and Saahil have a knack of finding themselves in unusual situations. Saahil tries to con their family too on an occasion, but being caught red-handed by Neha sparks off a friendship between them.
When Neha and her family are about to leave to tour Scotland, she misses the train. She is all alone left with Saahil in London. But characteristic of hers ? she asks Saahil to take her to Scotland by road. Saahil refuses, but has to give in to it and takes her in the car. During this journey Neha develops proximity for Saahil and senses that she is in love with him.
On reaching Scotland, Saahil comes to know that his mother?s condition has become critical and there are few chances that she may survive now. He is left like a sole loner all alone in this cold country. He tries to do everything right from gambling for quick money with the last chunk of money left to selling himself literally. He is unable to see any way out of this situation, except one option?and indecent option?
He was once asked by a stranger to sell girls to him and will be paid heavily for it, but he strongly resented it, but life now brings him to a situation where it is the only option. In a spate of madness Saahil makes a deal of handing over Neha to the stranger for the money required to save his mother. The stranger works for Kunaal Malik (Ashmit Patel) .
Kunaal Malik owns ?Erotica? the biggest whore house and sex centre in U.K. Kunaal is the big brains behind all kinds of illegal business right from drugs, mafia, contract killing etc. He is a cold hearted, ruthless man who has no mercy for anybody. When Neha retaliates to Kunaal?s objective of making her a part of this business, he cannot but help to be influenced by her innocence as no one has ever said no to him till date. He begins to live life and discover love that Neha evokes in him. Meanwhile Saahil returns to London with the money and saves his mother, but he also realizes that he is not able to erase Neha from his memory and is in love with her. He also realizes the magnitude of his sin and what he has done to her.
Saahil decides to take on the wrath of U.K?s mafia and bring back Neha into his life because now he has the power of love with him, but there is a problem?Kunaal Malik will not let go? the duel between a lost man who wants to regain his love and a man who has just discovered it forms the emotional tale called Dil Diya Hai.