Blackmail and murder aren't exactly history professor Trinity Pierce's areas of expertise, but when her former occupation—that of call girl—resurfaces in the person of Kate Kazanjian, Trinity's former madam, that's exactly what she has to investigate. George Kirkland, one of Trinity's colleagues—also Kate's client—is being blackmailed, and Kate needs Trinity to figure out who's doing it. But when the blackmailer is murdered with George in the next room, he becomes the immediate suspect, and now Trinity and Kate need to determine who is the real killer ... before it's Trinity herself who ends up dead.