Off the coast of Yucatan stretches a great coral barrier known as Scorpion Reef. And somewhere along the reef, under 60 feet of water, lies a fabulous treasure in diamonds. It's just waiting for someone who can take it--and return. Beautiful Shannon Macaulay has the only map to the fortune. And Bill Manning is the only man she can trust to help her get it. But unknown to them, a pair of killers is about to turn their treasure hunt into a whirlpool of terror and death. "A grand thriller, with tensely shifting suspicion and fine scenes of diving and sailing in the Gulf of Mexico."