"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...Sloan grows concerned that key details are being ignored, and a strange lack of urgency by authorities sets off alarms"--,Provided by publisher.