Georgie, Lissa, and Bronwyn have been inseparable since dominating their college swim team; swimming has always been an escape from their own problems, but now their shared passion has turned deadly. How can it be true that Lissa, the strongest swimmer they know, drowned? Granted, there is something strange about Kanu Cove, where Lissa was last seen, swimming off the coast of the fabulous island resort she owned with her husband.

Lissa's closest friends gather at the resort to honor her life, but Georgie and Bron can't seem to stop looking over their shoulders. Danger lurks beneath the surface of the crystal-clear water, and even their luxurious private villas can't help them feel safe. As the weather turns ominous, trapping the funeral guests together on the island, nobody knows who they can trust. Lissa's death was only the beginning....