Six friends went into the water. But only five came out. Former FBI Agent Gavin Larson has been dispatched to an island off the coast of Mexico to determine whether the sudden disappearance of a U.S. Senator's daughter was simply a senseless, tragic accident--or whether something far more sinister is involved. Making things worse, a Category Five hurricane is now bearing down on the island, but the Mexican Federale assigned to lead the investigation is insisting that all of the suspects shelter in place on their luxury yacht anchored just off the coast until he discovers exactly how she died. And who killed her.