Senthilnathan (Prabhu) and his wife, Ganga (Jyothika), move into a house once owned by evil King Vettaiyan, who had enslaved the beautiful Chandramukhi and then murdered her in a jealous rage. When bizarre events unfold, Ganga suddenly believes that she is Chandramukhi. Saravanan (Rajnikanth), a psychiatrist, is brought in to help Ganga's rapidly deteriorating mental state, but it takes more than medicine to free Ganga of Chandramukhi's spirit.