Kade Finley, of the Scottish Isles, was raised on legends of the sea. His Gaffer, Toran Finley, said that beneath Muireall's wind-swept cliffs, deep under the waves, there lived a legend as old as the Highlands themselves. Of Manannan Mac Lir, the sea god, and his beautiful sea maidens, the maighdean mhara, who swam the tides luring sailors to their deaths. But they're not just legend. Kade saw one on his ninth birthday. On that day, a fierce storm swallowed half the island, and his da, Aidan Finley, was never seen again. It's been nine years since Da disappeared, and Gaffer is dying. Desperate to save him, Kade decides to capture a maighdean mhara, of whom the stories say will grant one wish if caught. But Admiral Gilbert Owen, commander of the island's WWII naval base, complicates things. In his quest for power, the Admiral has enraged the maidens, making it dangerous to be human in maighdean mhara infested waters."