The film revolves around the story of a young girl Shweta (P. Shwetha) taking her first steps towards adulthood. Ready for the adventure, the thirteen year old is upbeat, however soon discovers that every night, her uncle Gautam (Kushboo) transforms himself into a woman to lead a completely different life. When Shweta confronts Gautam on the matter, Gautam tells her he wishes to run away and marry Aravan at a local festival, the Koovagam Festival. The festival is held annually where people of the third gender regularly meet to re-enact the story of Aravan, a character from the epic Mahabharata. Shweta decides to find her uncle and bring him back home, and along the way, she makes new friends of the third gender, and discovers a whole new culture.