Samar Anand, a hard working young immigrant in the city of London, glimpses upon the love of his life, a gorgeous angelic looking girl, (Katrina Kaif). They meet and their bond blossoms into love with time spent together. Samar however meets with a serious accident, and Meera vows to God she will leave Samar forever if he allowed him to live again, their love affair ends as quickly as it began. Samar angered with God and fueled with his love for Meera, declares War against Him. Samar Anand vows to walk into the jaws of death everyday as a challenge to God to keep him alive. He becomes Major Samar Anand in the Indian Army, a bomb disposal chief, defusing bombs without ever wearing a bomb suit. It is here that Major Samar also known as 'the man who cannot die' meets Akira (Anushka Sharma), a spirited vibrant, 'today's generation' Discovery Channel correspondent with a WTF attitude. Aware of Samar Anand's story, Akira is determined to unravel the mystery of love in this intriguing story,... Written by Official source

Babli (Ranbir Kapoor) is a street smart car mechanic living in a Delhi orphanage. He is charming and lives life to the fullest. He also steals cars to support his orphanage. He has no sense of right or wrong till he unwittingly hurts the love of his life, Tara (Pallavi Sharda). Babli realizes that there is no right way of doing the wrong thing. Babli sets out to fix all the wrongs in his life and he continues to be shameless about it.