Major Samar Anand (Shah Rukh Khan), fearless when defusing bombs, hides grief over a lost love behind a severe and stand-offish personality and a strong disregard for his safety. Akira (Anushka Sharma), a young filmmaker, finds Samar's journal, and discovers his past romance with Meera (Katrina Kaif), ten years ago in London.
After making a documentary on Samar, Akira returns to London, but needs him to come there as well, to verify the legitimacy of her story. Reluctantly he returns to the city of his heartbreak, and the unexpected brings Meera back into his life.
(Anupam Kher plays Meera's father. Rishi Kapoor and his real-life wife, Neetu Singh, play Meera's mother and step-father.)
The first two hours of this film were excellent; the plot was immersive and the characters believable. The make-up artists did a wonderful job making Khan look younger, but did not do so well aging Kaif. The music was mostly great and the cinematography was perfect. Khan and the vivacious Sharma had fantastic, natural chemistry together; Kaif was too stiff at times, however. Unfortunately, around the start of the third hour, when Samar returns to London, the plot becomes less credible and the ending lacks emotional punch. Despite that, it's a movie worth watching, just don't expect to be particularly moved by the ending.