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In the ancient village of Shivapuram, little Ananthan hears a tale from his mother, Gayathri (Revathi). She tells him that his family comes from a line of powerful magicians, and they are responsible for protecting nagamanikyam, a jewel on a serpent's head. The jewel, she narrates, lies in a secret place in the house guarded by snakes, including a tiny snake called Kunjootan. Years later, obeying the wishes of his dead mother, Ananthan (Prithviraj Sukumaran) returns to his ancestral village to light the lamps at Shivakavu, a dark and mysterious temple of Shiva.