Rizwan Khan, a Muslim from the Borivali section of Mumbai, has Asperger's syndrome. He marries a Hindu single mother, Mandira, in San Francisco. After 9/11, Rizwan is detained by authorities at LAX who treat him as a terrorist because of his condition and his race.

A lonely 40-ish man, likely to remain a bachelor, has a chance to find the love of his life when he falls for a vivacious young woman.

While traveling by train Shekhar attempts to woo Sanjana Sharma, but finds out she had given her heart to a former boyfriend, Rohit, who is no more. Both share some misadventures en-route to Simla, and upon arrival Shekhar openly declares his love for her knowing fully that this decision will bring nothing but heartbreak for him.

Zooni Ali Beg (Kajol) is a blind Kashmiri girl who travels without her parents for the first time with a dance troupe to Delhi to perform in a ceremony for independence day. On her journey, she meets Rehan Khan (Aamir Khan), a casanova and tour guide who flirts with her. Although her friends warn Zooni about him, she cannot resist falling in love with him and he takes her on a private tour of New Delhi. But there is more to Rehan than meets the eye and Zooni will have to make a heartbreaking decision.

Years after his father disowns his adopted brother for marrying a woman of lower social standing, a young man goes on a mission to reunite his family.

Raju is hired to pose as uncle to three orphaned kids in order to usurp their inheritance. But he changes his mind after falling in love with their governess and decides to fight the greedy relatives.

Not knowing what consequences she would face, a woman signs a 1-year marriage contract with a business tycoon to end her family's poverty.

Anjali is left heartbroken when her best friend and secret crush, Rahul, falls in love with Tina. Years later, Tina's young daughter tries to fulfil her mother's last wish of uniting Rahul and Anjali.

Set to win back her fiance's heart, Sanjana (Kajol) decides to travel back to India but little did she know that fate had something else planned for her.

When Vishal does not agree of Suraj and Muskaan's relationship, Suraj decides to win Vishal's heart for marrying Muskaan.