Sanjay Ramaswamy (Surya) suffers from short-term-memory-loss (STML). His memory gets refreshes every 15 minutes. He has very few clues about his past. He uses the aid of Polaroid photographs and tattoos to identity people around him and to perform the tasks. He looks out for Lakshman (Predeep Rawat) who killed his lover Kalpana (Asin). The remaining story of the film is about the love track between lead pair and how Sanjay takes his revenge.