On Whidbey Island, the Gray quintuplets are the stuff of legend. Pixie and her brothers have always been bigger and blonder than their neighbors, as if they were birthed from the island itself. Together, they serve as an unofficial search-and-rescue team for the island, saving tourists and locals alike from the forces of wind and sea. But, when a young boy goes missing, Pixie instead finds the dead body of somone else in Useless Bay and realizes that something sinister is rising from the water.