Kamal Haasan is an undercover cop working for the narcotics bureau. He is also very fond of his son (Aman Abdullah). Kamal conducts a very risky operation involving a huge stash of cocaine and drug dealers who won't show mercy if their loot were to be compromised. He soon gets entangled in a vicious drug war, which leaves his family in grave danger. Prakash Raj, a nightclub owner who sells these drugs to the dealers, kidnaps Kamal's son and demands the bag of cocaine as terms for his release. Working frantically against the ticking clock, Kamal needs to find this bag soon; but things get rather complicated when agents from his own department (Trisha & Kishore) intercept the bag and suspect him of playing a double game. It remains to be seen if the co-conspirators could be outsmarted and Kamal Haasan's son, saved.