Jai Amitabh Bachchan is an expert gambler has been for as long as he can remember and has never lost a game. These skills bring him to the attention of the underworld don Saxena who is interested in hiring him to win large amounts of money from rich people and then influencing them into doing whatever he wants. Jai agrees to do so and plays successfully though unknowingly to entrap Nath who works for the government. After losing large amounts of money he is blackmailed into revealing the blueprints of a top secret military laser weapon that can hit any target within 50 miles. When the Indian police come to know of this they assign the case to Inspector Vijay also Amitabh Bachchan who is asked to apprehend Jai at any cost. The only problem is that Inspector Vijay is Jais look alike and is not at all a good gambler.

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