Synopsis: The story is told by a retired police officer Ramaa to her granddaughter, a corporate employee harassed by a man in a mode of public transport. The tale traces incidents that the cop witnessed during her tenure and is centred on Kanaka. After being imprisoned in jail as a juvenile, Kanaka is released to her father, Vedha. A fiery Kanaka, even though battered and traumatised, has a steely resolve and goes on a relentless mission of vengeance along with her father.