He leaves no evidence. His victims have absolutely nothing in common. The police are trying in vain to stop the maniac, whose victims were a girl who “voted” on the road, an old woman and two young women from a respectable suburb. Witnesses are confused in their testimony... Experienced investigator Milo Sturgis again decides to ask for help from Alex Delaware, a psychologist and an excellent amateur detective who can unravel even the most mysterious and dangerous crime. However, this time even Delaware will have a hard time. After all, he has only one clue: the killer prefers to travel in luxurious black limousines...