On the night of their parents visit to celebrate her new job Fi returns to her brother's flat to find him drunk, they have an hour to sober him up to keep his drinking a secret.

With school exams over, it was one last chance to celebrate with close friends before going separate ways, but while toasting so-called 'friendship' and making plans for a final camping adventure together, Izzy, the new girl in the closely knit group, is hiding a dark and devastating past. Izzy’s secret follows the friends to the remote, tidal island of Lindisfarne off the North East English coast, steeped in myth and mystery, where her skeletons come well and truly out of the closet to take revenge on the trapped, terror-stricken teens.