Suraj, an NRI, moves back to India, only to realise that the caretaker of his property, Kalicharan, is now running a drug racket on his land. He helps the police force to track down Kalicharan.

Reflecting the tumultuous politics of the early ’70s in India, Deewar tells the story of a pair of impoverished brothers who, after their family is betrayed by the misplaced idealism of their father, struggle to survive on the streets of Mumbai. They head for a showdown when one becomes a policeman, and the other becomes a criminal.

Roy Kenner arrives in Bombay hot on the heels of dope smuggler Tom Jordan, the man who murdered his partner. Combing the city for clues to Jordan's whereabouts, Kenner crosses paths with 9-year-old Saji. Saji soon helps save Kenner from the lethal drug dealers, and takes Kenner to his home. Love soon blossoms between Kenner and Anasuya, Saji's mother, and Saji comes to see him as a father. But Kenner's obsession with vengeance threatens to engulf this accidental family in tragedy.