By diving standards, the weather was calm and the marine life was abundant. And of the 29,000 known species of fish, there is only a minuscule number that are actually harmful to man. But what happens when nature defies these odds and terrorizes a pair of divers off the Florida Keys? How far will a father go to protect his son? Better yet, how far will a young boy go to save his father? By nightfall, they would know these answers and learn more about themselves and each other than most people do in a lifetime.