In a city where justice seems to be a forgotten concept, a man with an ordinary life decides to become a superhero. Arthur Poppington is a construction worker who, after suffering a series of traumas in his childhood, immerses himself in a fantasy world where he fights crime with his alter ego. Armed only with his wits and a handful of improvised gadgets, he dresses in a black fabric costume and a war helmet. His mission: to clean the streets of the mafia and protect the innocent.
As Arthur delves deeper into his role as a defender, his personal life intertwines with that of other characters, including a young prostitute who, despite her circumstances, becomes his companion in this struggle. While trying to resolve his own emotional issues and the harsh reality surrounding him, he starts to question the line between madness and bravery.
However, the hero's journey is not easy. He faces opponents far more dangerous than he had anticipated, which not only tests his courage but also his sanity. As Arthur navigates between illusion and truth, the film explores themes such as isolation, the search for acceptance, and the fragility of the human mind. The story becomes an introspective journey that combines humor, drama, and action, keeping the audience on the edge of their seats while reflecting on what it truly means to be a hero.