Santha is a cheerful girl who is working in a lodge as a sweeper. She is well-liked by everyone in the lodge. Dinesh is in love with her. But one day Santha is found dead in the nearby well, and an investigation ensues.

Esthappan is a fisherman, who lives in a seashore colony. His story unfolds through narrations by other fishermen about his miraculous acts. Through the contradictory statements of these people, a mystical figure of Esthappan unfolds.