Investigating a serial carjacker whose actual targets are young children in back seats, Jack Caffery teams up once again with police diver Sergeant Flea Marley, whose life is endangered by a discovery in an abandoned, half-submerged tunnel.

"Coming from scandalous Florida treasure hunters and drug smugglers, Sloan McPherson is forging her own path, for herself and for her daughter, out from under her family's shadow. An auxiliary officer for Lauderdale Shores PD, she's the go-to diver for evidence recovery. Then Sloan finds a fresh kill floating in a canal--a woman whose murky history collides with Sloan's. Their troubling ties are making Sloan less a potential witness than a suspect....

"Sloan McPherson and the Underwater Investigation Unit have discovered a van at the bottom of a murky Florida pond. Sealed inside the watery tomb are the bodies of four teenagers who disappeared thirty years ago after leaving a rock concert. To authorities, it looks like a tragic accident. To Sloan, it looks like murder. Every piece of evidence is starting to connect to a string of cold case vanishings throughout Florida. Clue by clue, Sloan navigates...

A distress call draws rescuers Sloan McPherson and the Underwater Investigation Unit to a cruise ship off the coast of Fort Lauderdale that's sinking from a mysterious explosion. When it appears to be the work of an ecoterrorist and other ships are threatened, it becomes a race against time. More clues are discovered, and evidence is in danger of being washed away by a coming tropical storm. Sloan grows concerned that key details are being ignored,...