Detectives Goren and Eames fear they are facing a past fugitive serial killer who has re-surfaced after a half-naked woman is found murdered in a similar manner used by the taunting "BBJ" killer whose spree began 16 years ago and then abruptly halted. As forensic evidence points to a troubled young man, Goren believes the police might have arrested the wrong suspect -- or at least not the one responsible for the initial slayings.

After a busy dentist's wife dies from a form of dioxin poisoning, Detectives Goren and Eames ponder a likely set of suspects: the jealous doctor, the victim's possible online lover and a tight group of weekly trivia players. They also focus on who could have obtained the poison but their crucial clue is jealousy -- which might begin with a dead woman.