A lurching skid, grinding tires - a resounding crash. And Richard Wentworth, hastening to investigate the wreck of the car he had been pursuing, found all its occupants dead - electrocuted before the moment of collision! Within a week the passengers of a crack New York Central train met a similar fate. Go with the Spider as he rides alone - human bait in a speeding death trap - on one of the nation's doomed trains. Pierce with him the far-flung, gun-bristling cordon of an aroused Underworld - as he fights to save a hundred thousand Yankee lives!