P.R.V. is an influential person in Ramanathapuram district, running multiple business ventures all over the Rameswaram. He has 4 sons, 3 of whom: Ramachandran, Sivachandran, and Jayachandran are from his first wife, who died, and the youngest, Ravichandran, from his second wife Muthaaram. PRV loves all of his sons. Ravi loves his brothers dearly, but they always disregard him as their half-brother. Ramachandran manages the main business with 2 two brothers, while Ravi manages their low-income properties. Samuthiram, P.R.V.'s old friend from Rameswaram, blames his family for the death of his younger son, Pandi, and is out to avenge him with his elder son/Pandi's twin brother, Lingam, who is currently in prison. Ravi is the loving protector of P.R.V.'s family, always looking out and preventing his family from getting hurt. He also falls for Jebamalar, who eventually reciprocates his feelings.

Lingam soon gets released from prison after serving 7 years for killing a cop, who killed Pandi. Ravi realizes that Lingam is out for his family's blood, and secretly tries to protect his family. He soon stumbles upon his half-niece and Ramachandran's daughter, Selvi aka Paapa, with a Muslim boy, Raheem. Although Ravi accepts their relationship, he tries to prevent her from hasty decisions. However, Paapa elopes with Raheem, with the help of Jebamalar, unbeknownst to anyone. Ravi's caste fanatic half-brothers blame him for his inaction, despite knowing of Paapa's affair, and oust him and Muthaaram from their house. P.R.V. dies from the resulting distress. During his funeral, Ravi was not allowed to look at his father, for one last time, but Lingam and Samuthiram were let in. This incident enraged Muthaaram, and she ridicules the PRV brothers. Ramachandran, having lost his respect and family status, orders Pappa's death, to protect his honor.

Ravi decides to take things on his own and tries to locate Pappa. After intense efforts, he finds Pappa in Nagore, but Raheem is missing. Ravi brings her back to their house, where Ramachandran attempts to kill her, but Ravi stops Ramachandran and warns him. The PRV brothers decide to team up with Lingam to kill Ravi's household. Ravi tracks down Raheem, who was kidnapped by Lingam and reunites Raheem with his parents. At night, Lingam's men barge into Ravi's house while he is not home. Although Pappa and Muthaaram try to stop them from breaking in, Lingam and his men managed to enter and begin to attack them. Ravi arrives in time to protect his family from Lingam's attack. Ramachandran gets backstabbed by some of his own men, having been bribed by Lingam, who tries to double-cross the brothers, but he manages to survive the attack. Muthaaram and Pappa get brutally injured and are admitted to the hospital.

Ravi enters their house and tearfully reveals that he had chosen to sever the ties with the family, and reminds him of how he chose to work with Lingam, who went on to backstab him. A guilty Ramachandran reconciles with Ravi, but Lingam kidnaps one of Ravi's brother's child. Ravi begs Lingam to leave her alone, but Lingam doesn't budge. However, Samuthiram is disgusted at Lingam for trying to kill a child instead of the brothers's and distracts him for the child to escape. Lingam proceeds to kill Samuthiram and chases after the girl. Ravi arrives in time to save her and starts chasing Lingam to an island nearby. Ravi thrashes Lingam, but spares him, since he is about to become a father, thus ending the feud peacefully. Pappa, along with Raheem, reunites with Ramachandran. Ravi is also finally accepted as the brother of PRV brothers.