Nothing surprises Sgt. Joe Ryker. Not corpses, crimes, nor sin of any kind. But when a beautiful New York call girl personally persuades him to investigate a missing persons report and a severed arm comes bobbing up in the East River, Ryker is in for a surprise. There's someone more savage than he is in the city, someone who inhabits a nightmare world of blood and gore, someone who kills again and again in a way that goes beyond anyone's wildest dreams.

Hunting for the killer, Joe Ryker's penetrating a netherworld of underground tunnels--and this time the cop could go too deep...