Theerpu (1982)

When Superintendent Rajasekar’s daughter is raped by a vengeful smuggler, he takes the law into his own hands and kills the man in a fit of rage. Arrested by his own son—the very police officer he raised—Rajasekar refuses to reveal the real motive behind the murder, determined to protect his daughter’s honor. As the trial unfolds, his other son, a lawyer, must uncover the truth and defend his father, before the silence destroys them all.