Most towns have their secrets. In the 1930s, Port St. Joe, on the Gulf in Florida’s panhandle, had more than its share. Morphine-addicted old Doc Berber, the town’s only general practitioner, thought he knew most of them. But a murder out at the Cape San Blas lighthouse pulled him into series of intrigues that even he did not know how to cure. But first, of course, he needed to follow the biblical injunction: Physician, heal thyself.