Surinder "Suri" Sahni is a shy, introverted, and kind-hearted office employee for Punjab Power who falls in love at first sight with Taani, the extroverted, cheerful daughter of his former Professor Gupta at her engagement, but is unable to express it. Her fiancé and her entire wedding entourage are killed in a road accident. The shocked Gupta suffers a major cardiac arrest and is hospitalized. On his deathbed, fearing that Taani will be alone in the world, the dying Gupta implores that Surinder marries her. Surinder silently concedes because he likes her anyway and as a respect to his professor, while Taani agrees to fulfill her father's last wish. After an impromptu wedding, Surinder takes Taani to his ancestral home in Amritsar. While his good nature leads Surinder to treat her with exceptional care;– he even lets her have his bedroom all to herself;– he is too frightened to profess his love for her. Taani later tells him that she will try to be a good wife and thus respect her role in his life, but that she can never love him due to having no love left within her after the loss of her former fiancé. Surinder, grateful for the increasing acts of wifely affection that Taani shows him, proceeds to indulge her wishes. These include regular evening trips to the cinema to see Bollywood movies which appeal to Taani's fantasies about romance and her passion for dancing.
A few days later, Taani finds a dancing competition poster and asks for Surinder's permission to take part in it as it would help her unwind from her mundane life at home. He grants her request and provides the entry fee. During the evenings that Surinder and Taani spend at theatres, Surinder realises it is the strong and masculine images of men that Taani admires, and later on, asks his best friend, Balwinder "Bobby" Khosla, a hair-salon owner, for grooming advice that could help him win her love. Bobby gives him a complete makeover—which includes trimming off his mustache, changing his hairstyle to spiky, and fitting him out in funky Western-style clothing, including aviator-style shades with oversize pastel lenses. Surinder is thus transformed into "Raj", a name he borrows from the hero of a film that Taani admired. Raj goes to Taani's dancing competition venue to see her dance. Raj joins the competition and at the end of that dance class, all participants are put into groups of two by random numbers given by the staff, and both Raj and Taani have the number '21'. Despite Raj's initial over-the-top attempts to emulate the "cool" images given by heroes in films, after the first attempt of impressing Taani in that way, Taani refuses to be his partner, telling 'Raj' that they will never win the competition if he continues his antics. Raj responds by imploring her that he will improve and they become friends, working together on their dance routine. ReadMore>