Deewane is a story about everybody who is in love, who wants to fall in love, who is looking for love and those who are fortunate enough to experience love. It is a story about Sapna (Urmila Matondkar) a girl full of life and lots of dreams. She is searching for the unknown. Love, passion, care and happiness. She finds this in Vishal (Ajay Devgan) or so she thinks a hard cop committed to his profession. She gets engaged to Vishal but while raiding a boat, Vishal is shot.
Vishal's boss Commissioner Chavan (Shivaji Satam) produces a lookalike, Arun, to replace Vishal. Mistaking him for Vishal, Sapna is thrilled with this new persona and falls in love all over again. The real Vishal wakes up from his coma, putting an end to Sapna's romance with Arun.
Deewane is also about Pooja (Mahima Choudhary) who has never confessed her feelings to the man she longs for, does love need to be expressed through words? Deewane is a film about happiness and sorrows, union and separation, love and longing.