Thirteen-year-old Finn loves bike riding but when he has a spectacular crash he just receives a diagnosis that changes his life. He is slowly going blind. In a few years his vision will be gone. Desperate to salvage something of his last summer, Finn invites a friend to the cottage and is drawn to a strange island that seems to glimmer but no one else can see it. When he gets close, he's sucked into something he could never have anticipated. Can Finn's friend Cheese help him come to terms with lights out or will it take something much more extraordinary?