Rani is a young bride who is neglected by her indifferent and unfaithful husband, Appanna. Appanna spends most of his time with his concubine and comes home only for lunch. Rani is a typical wife who wants to win her husband's affection by any means. In an attempt to do so, she decides to drug her husband with a love root, which she mixes in the milk. That milk is spilled on the nearby anthill and Naga, the cobra drinks it. Naga, who can take the form of a human, is enchanted with her and begins to visit her every night in the guise of her husband. This changes Rani's life completely as she starts to experience the good things in life though she never knows that the person with her is not her husband but the Naga. Soon she becomes pregnant and breaks the news to Appanna. He immediately accuses her of adultery and says that he has not impregnnated her. The issue is referred to the village Panchayat. Rani is then asked to prove her fidelity by putting her hand in the snake burrow and taking a vow that she has not committed adultery. (It is a popular belief that if any person lies holding the snake in their hand, they will be instantly killed by the snake God.) Rani places her hand in the snake burrow and vows that she has never touched any male other than her husband and the Naga in the burrow. She is declared chaste by the village Panchayat. However, her husband is not ready to accept that she is pregnant with his child and decides to find out the truth by spying on the house at night. Appanna is shocked to see the Naga visiting Rani in his form, spending time with her and then leaving the house. Appanna gets furious with the Naga and indulges in a fight with him. Both of them fight vigorously. Eventually, the Naga dies in the fight. After this incident, Appanna realizes his mistake and accepts Rani along with the child she is carrying.