Aei movie begins with Sakthivel (Sarath Kumar) selling electrical accessories along with his friend Palani (Vadivelu) leading a peaceful life at Palani. He comes across Anjali (Nameedha) and falls in love with her.Sakthivel's past is made to unfold in a flashback. He is a military officer who joins his friend Mani (Kalabhavan Mani) on a vacation. The duo decides to reform the society and cleanse the police department by taking as hostage a few corrupt police officers.