Rocky is a hitman, who is released from prison where he learns that his sister Amutha has left the city and stays at his friend Mahalingam's house, where he enquires a gangster named Samy about Amutha, but to no avail. Mahalingam finds through Nadarajan that Amudha is in Sellur, which he informs to Rocky. Meanwhile, A flashback reveals that Rocky lived with his mother Malli and Amutha in Madras. He worked with a drug smuggler named Manimaran. Malli objected to Rocky's decision for working with Manimaran, as her husband (Rocky's father) had worked and lost his life working with Manimaran. Rocky heads to Sellur where he meets a pregnant Amutha, who berates him for his mistakes but reconciles with him.

Suddenly, Manimaran's henchman, along with an Inspector arrive, where they knock Rocky and kill Amutha. Rocky awakens alongside Nadarajan, who learns about the incident. They reach the Inspector's hideout and brutally kill the Inspector and the henchmen. Rocky heads to Samy's lodge where he tortures Samy's assistant, who reveals Manimaran's location in an abandoned construction site in Meenjur, He also kills him afterwards. They reach the site only to fight with the goons resulting in Nadarajan being killed. Rocky kills most of the goons including Samy, where he confronts Manimaran, only to learn that they killed Amutha's husband.

Amutha's daughter is the only lone survivor where she is held by Manimaran's right-hand Thanraj at knifepoint. Rocky escapes along with Amutha's daughter after knocking Manimaran and Thanraj where they leave for Malli's village in Tamil Eelam. It is revealed again in a flashback that Rocky killed Manimaran's son when Manimaran's son was jealous of Rocky who took over the consignment and was berated by Manimaran, due to which Manimaran's son killed Malli. During the journey, Rocky learns about his niece name: Malli, who was name after Malli and a bond grows between them.

Thanraj kills Mahalingam and traces Rocky and Malli in Dhanushkodi, where he tries to kill him, but Rocky kills him by stabbing his eyes with a sharp object and kills the remaining henchmen. While reaching Dhanushkodi, Rocky faces Manimaran and the entire criminal fraternity of Madras where he kills all of them using a M134 Minigun, which was actually a part of the consignment secretly kept by Rocky. With no one else to trouble him as Manimaran committed suicide, Rocky along with Malli leaves on a boat en route to Malli's village, where Malli ask Rocky that if she could tell a story about an eagle.