Private Investigator Patrick Kenzie wants to know why a former client, a perky woman in love with life, could, within six months, jump naked from a Boston landmark -- the final fall in a spiral of self-destruction. What he finds is a sadistic stalker who targeted the young woman and methodically drove her to her death. A monster the law can’t touch. But Kenzie can. He and his former partner, Angela Gennaro, will fight a mind-twisting battle against this psychopath even as he turns his tricks on them.