Jess thought the old tales of dangerous creatures living beneath the water were just crazy stories, until her friend Freya was stolen. To rescue her Jess must capture one of them - a shapeshifter, a kelpie - but he's nothing like she imagined. Finn sees her in ways that no one ever has. Not even Magnus, who's known her all her life. Caught between two worlds, Jess must choose between what she's always known and what lies... Beneath.