The Shadow returns with blazing .45s for his most startling adventure yet! A subterranean menace is haunting New York City, slicing and burning anyone caught in the sewers at the wrong time. What dark force propels it? Who is behind this insatiable leviathan? Is it the lady evangelist? Her beautiful daughter? The monomaniacal scientist? His ambitious assistant? The murderous jewel thieves? The Russian spies? Only the Shadow knows!