1970 film by A. B. Raj

King Rajasekhara, the king of Pandalam, finds a child on the banks of River Pampa during one of his hunting expeditions. A saint who appears there advises the king to adopt this child name him as Manikantan

Rajan, a police officer, is in charge of the investigation regarding a murder that took place on a train. He tries by hook or by crook to find the culprit as he has only one witness.