Seventeen-year-old Crystal White is the new girl on Starfish Island. Dragged to the remote community by her environmental activist father, she is eager to find fun that doesn’t involve touching fish guts or listening to local folklore.

During a midnight swim with some new friends, Crystal is pulled out to sea by the waves. Convinced she’s going to drown, Crystal is rescued by Llyr, a handsome stranger. As she searches for him in the following weeks, she finds there may be more truth to the Starfish legends than she thought.

Over a sizzling roller-coaster summer, Llyr introduces Crystal to magic she’d only ever dreamed of. But as Crystal comes to love Starfish Island, it begins to drive her family apart. A nearby power plant is devastating local marine life, and her parents are stuck in the middle. As the magic and mundane parts of Crystal’s life converge, she finds herself risking everything to save Llyr, her family, and herself.