Enthusiastic young Lachchi (Rani Mukerji) is to be married to Kishan (Shah Rukh Khan), the son of the rich merchant Bhanwarlal (Anupam Kher). Kishan is a dutiful son who honors his father’s wish to start a new, far-away business on a predetermined auspicious date, which happens to be the day after the wedding ceremony.
On the wedding night, Kishan turns away from his wife to finish his bookkeeping, and in the early morning hours sets off on a business trip that is to last five years. Lachchi is devastated; Gajrobai (Juhi Chawla), her husband’s sister-in-law, consoles her, empathizing on the grounds that Gajrobai’s husband Sunderlal (Sunil Shetty) has also disappeared. The next day, a ghost appears, having taken Kishan’s shape and voice because of his own attachment to Lachchi.
Lachchi is thus presented with a dilemma between the representation of all of her desires in the form of the ghost who has taken the form of her real husband. She takes this newfound, sensual, magical, social, self-confident version of Kishan as hers. As Kishan, the ghost befriends all of the real Kishan’s family and keeps Bhanwarlal happy by providing him with magical, possibly illusory, gold coins.
His only blunder is in his treatment of the messenger Bhoja, who is perplexed by the idea that Kishan has sent a letter from his business trip only to receive it himself in his own house and offended when the ghost (who appears as Kishan) does not offer him a drink of water. Lachchi’s bliss goes on until four years later when she is pregnant and the real Kishan returns to see if the rumours about his wife’s pregnancy are true. He returns to find the ghost in his (Kishan’s) own form. Kishan’s family is unable to determine which of the doppelgangers is the real Kishan (the ghost refusing to confess). They decide to visit the king so that he can arbitrate.