In a city that can swallow you whole, only one man can find what cannot be found. Ninette Moeller steps off a flight from Paris and onto the mean streets of New York City. She's after one Lucien Denali, a man who has done unspeakable damage to her. She hires the tireless Mr. Keen: Tracer of Lost Persons, to hunt him down. Sure, it sounds easy — the man's a big name in the underworld, getting him in their sights should be no sweat. But Denali's bulletproof, like ten inches of Kevlar!