Sanjay is introduced as he brutally murders a man. He takes an instant picture of the man, and writes on it "done". Sanjay has anterograde amnesia; he loses his memory every 15 minutes. Sanjay uses a system of photographs, notes, and tattoos on his body to recover his memory after each cycle. It is revealed that Sanjay is ultimately out to avenge the death of his lover Kalpana, and that he is systematically killing the people responsible. His main target is Lakshman, head of Kolkata based human trafficking network and a notable socialite in Chennai.