Thaimel Aanai is the story of a son's revenge on the killers of his mother and sister, but his friend, who is now a Police officer, does not like someone taking the law into his hands. In the end, the villains kidnap Vinod's family. Raja storms the hideout of the villains along with Vinod and rescues Vinod's family by fighting with the villains, killing the goons who destroyed his family in the process. But sadly, Raja dies of the injuries he received during the fight. The movie ends with Vinod carrying the corpse of Raja and walking away along with his family.