Out of sight is not out of mind. Within sight of Marathon, Florida, lies an island left to its own devices. While its harbor is picture-postcard perfect, abandoned, and hurricane-ravaged, Boot Key has a secret hiding deep in its mangrove tunnels and derelict fishing shacks. With its only bridge deemed too costly to maintain and its center span removed, Boot Key is accessible only by water. The authorities give the few residents a wide berth - until Mac Travis, working a salvage job, discovers the body of an old friend. His search for justice leads him down a road of murder and deceit.