Samar (Shah Rukh Khan) meets Meera (Katrina Kaif) in London and they fall in love. Samar however meets with a serious accident and Meera vows to God to leave Samar, if he saved him. Samar angered with God, becomes a bomb disposal chief in the Indian Army. Here he meets Akira (Anushka Sharma). Is she able to unravel the mysteries, does Samar win the battle, or does God surrender to his love.—Official source