ACP Parasuram helps Siva's mother, a widow, in recouping their wealth. Brainwashed by Akash, a terrorist, Siva works against the police and the government and believes they killed his brother.

Raghu, an atheist archaeologist, and his father goes to an isolated village for research, his father disappears mysteriously and Raghu finds out a strange prophecy : God will come to earth on Purnima day at the Nagakali Amman temple and the people who will submerge completely under the waterfall near the temple will be cured of any disease. His colleague Pathma informs her blind Journalist friend Divya and the news reaches the public. Pathma is in love with Naveen, in the final stages of cancer. Soon, an atheist terrorist group, led by Saravanan, try to destroy the temple. Saravanan's sister and brother-in-law were brutally killed by the temple's donor. Police officer Hari, Divya's brother, is charged with eradicating the terrorist group. Pathma believes in this prophecy, gets married to Naveen and takes him to the temple. Divya compels Hari to come with him to restore her sight and he agrees. A race against the clock starts.

After Vanavarayan's son Sathyam and his friends rape Velan's fiancee Valli, he vows to murder them.