Billa (1980)

Fast-paced and fiery, this masterfully crafted crime thriller daringly depicts the dangers faced by an innocent villager, Rajappa, when he agrees to assist the police. During a police encounter, Billa (Rajinikanth), a feared Mafia don in Madras is fatally wounded. However, the police decide to hide this truth, identify a lookalike, train him to believably impersonate the dreaded mob boss even in the midst of his long time and close associates. Can a mere impersonator learn fast enough and be suave enough to fill the shoes of an international criminal? Will he succeed in exposing the criminal network around Billa, unravel the Don's closely held secrets and bring down the criminal empire before his own life is threatened?