Ben Reilly, an aging and down on his luck private investigator in 1930s New York, is forced to grapple with his past life as the city's one and only superhero.

When Reggie is abandoned on the mean city streets by his lowlife owner, Doug, Reggie is certain that his beloved owner would never leave him on purpose. But once Reggie falls in with Bug, a fast-talking, foul-mouthed stray who loves his freedom and believes that owners are for suckers, Reggie finally realizes he was in a toxic relationship and begins to see Doug for the heartless sleazeball that he is.