The movie begins in Kumbakonam where a crooked advocate Sattanathan Pillai (D. Balasubramaniam) is keen on getting Vadivambal (M. S. Draupadi), married to his useless brother Masilamani (T. K. Ramachandran). Sattanathan Pillai pretends to help the innocent Sundaram Pillai from Sundaram Pillai’s crooked sister Alangaram. Sundaram Pillai is a good man who helped his sister. However his sister Alangaram plans to grab his brother’s wealth. The crooked Sattanathan Pillai together with the judge plays a double game against Sundaram Pillai (which Sundram Pillai do not know at that time). Vadivambal’s mother Anjalai and Anjalai’s husband Namachivaayam Pillai force Vadivambal to marry Masilamani. One day Vadivambal was visited by her maternal grandmother, she came to know from her grandfather that he is staying in Mannnargudi Velayudham Pillai’s house and Vadivambal’s mother is not married. She decides to leave their house to Mannargudi to meet her maternal grandfather. Meanwhile, Digambara Samiyar (M. N. Nambiar) who has renounced his life had confusion in his life. He was advised by a female monk to help people from the crooked Sattanathan Pillai. One night Digambara Samiyar passes by at Alangaram house. He overheard the judge and Alangaram in conversation and their cruel intention. On his way Vadivambal was attacked by robbers. Digambara Samiyar passes by and saves her and gets to know about Vadivambal’s forceful wedding arrangement with Sattanathan’s brother Masilamani. While they reached Mannargudi, they were attacked by Masilamani and Namachivaayam Pillai. However Kannapa passes by and rescues Vadivambal and Digambara Samiyar. Both Kannapa (P. V. Narasimha Bharathi) and Vadivambal fall in love at first sight. Velayudha Pillai and Kannapa greet Digambara Samiyar into their house. Velayudha Pillai had once worked in Sattanathan Pillai. Once Velayudha Pillai’s wife was infected with cholera and pregnant. Sattanathan Pillai chased out Velayudha Pillai. Velayudha Pillai was helped by Chokka Lingam Pillai. Sattanthan Pillai cheated Chokka Linga Pillai and tried to rape Chokkalingam Pillai’s wife. She was saved by Velayudha Pillai. Digambara Samiyar visits Sundaram Pillai and heard about his wife’s status. Sundaram Pillai says that his 3 year old daughter was kidnapped 15 years ago. His wife gets upset and visits a saint to know the whereabouts of his daughter. The good man tells Sundaram Pillai’s wife that she will not return until she is married. While Sundaram Pillai and Alangaram decide to leave, Sundaram questioned his wife’s presence. Alangaram and Sattanathan Pillai accused Sundaram Pillai’s wife of having an affair with the saint, which makes Sundaram Pillai reject his wife and leave. The lawyer is at cutting corners, and a person in saintly robes known as Digambara Saamiyar (M. N. Nambiar) is out to expose him. He appears in various disguises and succeeds in his attempt after the story has several twists and turns. The novel is based on a theory that if a man is made to stay awake without sleep for 3 to 4 days, he will be in a mood to confess everything hidden in his mind!. This theory has been used to great effect in the film, to keep the lawyer awake, a song and dance sequence featuring Kumari Kamala were introduced.