When the clients, a reckless boy Julie's age and his equally foolhardy father, disregard Julie's instructions during the dive, she quickly realizes she's in over her head.And once she surfaces, things only get worse: One of the clients is in serious condition, and their dive boat has vanished--along with Julie's father, the only person who knows their whereabouts. It's only a matter of time before they die of hypothermia, unless they become shark bait first. Though Julie may not like her clients, it's up to her to save them all.