Bachna Ae Haseeno

1996, Switzerland – Mahi

Raj goes on a trip to Switzerland with his friends after his 12th standard exams. He runs into Mahi Pasricha on the Eurail, who is on vacation with her friends and family. Mahi is a sweet, dreamy girl who believes in true love and is hoping to find her 'Raj' (the protagonist of the 1995 romantic movie Dilwale Dulhania Le Jayenge) i.e. her true love. When she misses her train, Raj helps her reach the airport through a different route. On the way, they share a kiss after Raj reads her a poem he wrote about her. She then falls in love with him. At the airport, when she opens the paper on which Raj had written the poem, she finds it blank. Raj boasts to his friends about what happened between the pair and how he took full advantage of the situation when she was alone. Mahi overhears this and is shocked and heartbroken. Raj realizes that she has overheard his conversation with his friends and shamefacedly leaves.

2002, Mumbai – Radhika

Six years after the Switzerland episode, Raj has moved to Mumbai and found a job with Microsoft as a game designer with his best friend Sachin Kashyap. Pretty soon, he enters into a live-in relationship with neighbor Radhika Kapoor, an aspiring model from Ranchi. Having received an offer to move to Sydney for a game launch, he expects to be able to leave Radhika and move on, assuming she is capable of handling a break-up. This vision is shattered when Radhika declares that she intends to sacrifice her career to marry Raj and join him in Australia. Raj frantically makes up reasons to prevent them from getting married, but Radhika remains firm. Unable to express his commitment phobia, Raj, along with Sachin, boards his flight to Sydney on the morning of his wedding. Radhika learns this while waiting for Raj at the registrar's office dressed as a bride and is left heartbroken in the rain.

2007, Sydney – Gayatri

5 years down the line, Raj now enjoys a successful career along with Sachin in Sydney. He meets Gayatri Divecha, a feisty and an independent woman who studies at a business school during the day, works in a supermarket and moonlights as a taxi-driver at night. As they date, he gains feelings for her. He also realizes that his feelings for her challenge his misgivings towards commitment. He proposes to her, but Gayatri turns him down, saying that she is happy with her life as she is and she doesn't believe in marriage and commitment as she believes that she doesn't need anyone to fulfill her needs and demands.

Rejection cuts Raj deep. He recalls when he broke the hearts of Mahi and Radhika, realizing how they must have felt. He decides to seek them out and ask for forgiveness.

2008 – Present Day

On his return to India, in Amritsar, in 2008, Raj first seeks out Mahi, who is now married and has two sons. Her husband Joginder "Jogi" Singh Ahluwalia recognizes Raj from the Switzerland episode and knocks him out. He blames Raj for Mahi no longer believing in love or romance because of him, although he explains that she is a perfect wife and has a perfect home and family. Firm in his decision not to leave without being forgiven, he befriends Jogi's friend Karan Bahl, who is set to be married. At Karan's sangeet ceremony, Raj apologizes to Mahi and convinces her that Jogi is her true love, while also reconciling with the Pasrichas in the process. She opens up to Jogi and forgives Raj.

Raj then searches for Radhika and discovers that she has rechristened herself to Shreya Rathore and has become a successful supermodel. Raj tries to meet Shreya at an event but she ignores him. Shreya then flies to Capri for a vacation and Raj follows her there. Raj finally meets Shreya but she refuses to accept his apologies and tells him that if he really wants her forgiveness, he will have to work for it. Willing to do this, Raj becomes her personal assistant and she makes him do all sorts of tasks, even serving at parties. She humiliates him on every occasion, but he remains firm, serving without complaints. She finally gives up and tells him how hurt she had felt back then, and asks him to leave. However, before Raj goes home, she arrives and tells him that she realized that the root of her frustration was bottled-up hate against him that she no longer bears. She then forgives him as he leaves.

Content, Raj returns to Australia. On his return, he finds a pile of letters from Gayatri, written over the six months he was gone. Raj meets Gayatri in her taxi. She regrets turning him down. The lovers reconcile and confess their love.