Benaam (1974)

While driving to a party Amit Srivastav (Amitabh Bachchan) and his wife Sheela (Moushumi Chatterjee) watch a man getting stabbed. Amit stops to help the man, and even takes him to a nearby hospital. The man is Mr. Verma, a reporter, about to expose an influential and wealthy person. A few days later, Amit starts to receive telephone calls from a man, warning them, and asking them for information Mr. Verma had with him. Amit does not know about this information, and decides to keep it to himself. Strange incidents strange troubling the couple, And then Amit and Sheela's son, Rajoo (Master Bunty) disappears. No one has any clue to where Rajoo is.