Hell is within us. And the devil, in the form of a professional killer, haunts the tourist paradise of Venice. Naked boy corpses are floating in the canals, and the media are already calling him the "Venice Ripper." Parents are reacting in panic and want to lock their children away. Were pornos filmed? Or is there a twisted lone perpetrator behind the murders? Private detective Lupino Severino and Commissioner Ludovico Ranieri are groping in the dark, but they must catch the culprit before there are more victims...