Karthik (Nikhil) is a medical student and also a fearless atheist. There is a famous Karthikeya temple in Subramanyapuram. This temple is shut down an year back. All the curious people/journalists who try to enter temple are killed by a snake. Karthik who is sent for a medical camp to Subramanyapuram stumbles upon a few mysterious events. The rest of the story is all about how Karthik chased the mystery.