From that day on, Rohan was known as the "Paheli Index Detective", and his legendary discovery was whispered about in cinema circles for years to come.

The story follows Lachchi (Rani Mukerji), a newlywed woman left behind by her merchant husband, Kishanlal (Shah Rukh Khan in a dual role), who goes on a business trip for five years. A ghost (also played by Shah Rukh Khan) falls in love with Lachchi and takes the physical form of her husband. The "ghost husband" returns to her, offering love, attention, and kindness—things her real husband never gave. The film becomes a riddle: Who is the real husband? Can love transcend human form?