The narrative centers around (Amitabh Bachchan), a ruthless, highly intelligent leader of an international crime syndicate. Despite the relentless efforts of DSP D'Silva (Iftekhar), Don remains elusive, leading to the iconic line: "Don ka intezaar toh gyarah mulkon ki police kar rahi hai, lekin Don ko pakadna mushkil hi nahi, namumkin hai" (The police of eleven countries await Don, but catching him isn't just difficult, it is impossible).