The film opens with Ved (Ranbir Kapoor) and Tara's (Deepika Padukone) monotonous back stories as people in the corporate world.[clarification needed] A flashback shows, as a child in Shimla, Ved is fascinated by the stories narrated by a road side story teller (Piyush Mishra) who keeps mixing up his characters. The film moves to real time where Tara meets adult Ved, while both are holidaying in Corsica. They come up with an amusing verbal pact to keep their real identities undisclosed. They explore the island together. They pretend to be "Don" and "Mona Darling" and talk in filmy dialouges. When she realizes she is falling in love with Ved, Tara decides to leave Corsica despite the romantic friendship with him.
The story flashes back to young Ved who questions the story-teller about the reason for happy times ending quickly and notices each story has a sad episode in it. Tara returns to Kolkata, India. Tara's father (played by Nikhil Bhagat) hands over his tea business to Tara, she expands it by starting a line of tea boutiques, taking the company ahead. She is off to Delhi for work and four years have passed. One day, Tara surprisingly meets Ved, who is now a product manager. They reveal their original identities. They plan for a date at a Japanese restaurant. She expects him to talk like the days in Corsica but Ved talks about business. She calls Ved up home to be intimate. Ved leaves for his home and next morning Ved wakes up on time, completes the morning chores, wipes the car, ignores the transgender on the way, lets a female colleague into the lift all this happens on his way to the office. He fixes a plan for meeting Tara again in the evening. Each morning to evening, similar incidents repeat monotonously. On Ved's birthday, he proposes to Tara but she is unhappy with the real-life Ved. She declines the proposal. Ved leaves for his home by an auto-rickshaw. The driver (played by Ishteyak Khan) narrates how his dreams of becoming a singer were crushed. Ved breaks down and his residual schizophrenia is triggered.