Six months after the disappearance of Tuscarora, PA businessman Tom Gruneman, his boss, Peter Cable, and his wife, Holly Gruneman, hire Tom's friend, private detective John Klute to find out what happened to Tom, as the police have been unable to do so, and despite John having no expertise in missing persons cases. The only lead is a typewritten obscene letter Tom purportedly wrote to Manhattan actress/model/call girl Bree Daniel, who admits to having received such letters from someone, and...