Batman, the costumed crime-fighter who prowls the night skies in Gotham City, soon finds there's another vigilante in town knocking off prominent mob figures. Despite the scythe-like blade for a hand, a mechanical voice and the cloud of smoke that follows the figure wherever it goes, the police and outraged officials mistake the homicidal crusader for Batman himself and demand that the city's longtime hero be brought to justice. Meanwhile, Andrea Beaumont returns to town.