From the back:
Deke Fagin, known to all members of the Syndicate and the police as the ‘Investigator’ was assigned the task of finding the murderer, or murderers, of one of Annie’s girls and a trick who turned out to be the only son and heir of wealthy, influential Wilma Van Dyke. The assignment should have been an easy one, but Deke ran into a series of com-plications . . . like dope, missing persons, more murder and a new mob doing their best to muscle in on the Syndicates operation.
In fitting together the pieces of the jig-saw of violence and death Deke is constantly in grave danger himself and ends up on a cold, lonely beach, begging some cop to give him aid.