Maharaja follows the story of Maharaja, a quiet barber in Chennai whose wife dies in a truck accident, leaving his daughter, Jothi, to survive, protected by a dustbin named “Lakshmi.” Years later, Maharaja reports a robbery involving the dustbin, which leads him to a path of revenge. He discovers that his daughter was assaulted by criminals, including Selvam, a man with a hidden past. The film reveals family secrets and culminates in a powerful confrontation between Maharaja and Selvam, with tragic consequences.