Simran (Kangana) is an alcoholic. Aakash (Emraan) is a singer in an Indian restaurant, comforts her when she; s feeling low. Together in faraway Seoul, friendship turn to love. He learns of her past, anf the reason for her lonelines. From bar dancer in Mumbai to a pointless existence in Seoul, Simran became the girlfriend of gangster Daya (Shiny), a man on the run from Mauritius, to Dubai to Seoul. When Daya learns of Simran's affair, he promises to mend his ways. But Simran is carrying Aakash baby, she; s torn between two men, but is in for a rude shock when she makes her choice!

Auto engineer Aditya (Akshay Kumar) and talented dress designer, Sonia (Bipasha Basu) are engaged to be married. Adi leave for Canada for training while Sonia takes off to France for a fashion show. In Canada, Adi meets the gorgeous Jia (Katrina) who's shopping for her marriage to an affluent entrepreneur, Karan. Jia is a girl of simple taste who craves for companionship, which her tycoon father and fiancee cannot give. Adi enters her life like a saviour... and friendship turns to love. A misunderstanding drives them apart... she to resumes marriage plans to Karan, and he to Sonia. Does true love find its way? Or do lovers make peace with their destiny?Fate intervenes when they meet for one last time at Jia's wedding.

Rohit Mehra (Hrithik Roshan), who shows the world that friendship is truly universal. Sanjay Mehra is a scientist obsessed with establishing contact with extraterrestrial life. He invents many innovative gadgets, instruments and finally succeeds in devising a computer that can transmit messages to space. His foresight becomes reality when as a response to his signals, a spaceship is sighted in the sky. But before Sanjay can even enjoy his success, he and his wife Sonia meet with a horrific accident where Somia survives but Sanjay loses his life.

A friendship that starts off in the picturesque, hilly town of Shima and ends or rather continues in the traditional yet modern city of London. Much like Raj, Pooja, and Tina traditional in their values, yet modern in their approach and outlook to life.