'Don' (Amitabh Bachchan) is a ruthless smuggler who dies during a police confrontation in DSP's (Iftekhar) car and so only he knows that Don is dead. As a co-incidence there is his look-alike a country man named Vijay (Amitabh Bachchan), who has come to a city for the first time. DSP spots him, trains him like real Don and sends him as 'Don' to the notorious gang. Zeenat...

'Don' (Amitabh Bachchan) is a ruthless smuggler who dies during a police confrontation in DSP's (Iftekhar) car and so only he knows that Don is dead. As a co-incidence there is his look-alike a country man named Vijay (Amitabh Bachchan), who has come to a city for the first time. DSP spots him, trains him like real Don and sends him as 'Don' to the notorious gang. Zeenat comes to know the difference but she has already fallen in love with Don Duplicate. She joins him and Iftekhar in the warfare.