When rich boy Matt Revington offers Annie Devane a summer job on an archaeological expedition to nearby Shell Islands, she had no reason to think her safety would be compromised. The former home of the Montauk Indians is a beautiful, unspoiled group of islands which developers are itching to take out of the hands of local environmentalists. However, Annie soon discovers the group's true mission. Furthermore, the fate of the islands depends on whether Matt and Annie live to talk about the startling discovery that they make.