Luke hates his life. His dad is busy with a shiny replacement family and his mum has insisted they spend their holiday on a remote Scottish island. Then Luke meets Meg, who lives with her grandfather in a boarded-up boat house on the beach. And when together they rescue an otter pup that they name Willow, a chink of light appears in Luke's dark and lonely days. But danger lurks behind the beauty of Puffin Bay - and soon Luke must depend upon Willow for his very survival ...