When a former client jumps naked from a Boston landmark, Private Investigator Patrick Kenzie wants to know why. Once a perky young woman in love with life, her suicide is the final fall in a spiral of self-destruction.

What Kenzie discovers is a sadistic stalker who targeted the woman and methodically drove her to her death – a monster that the law can’t touch. But Kenzie can. He and his former partner, Angela Gennaro, will fight a mind-twisting battle against the psychopath, even as he turns tricks on them…