On the night of high school graduation Nantucket island is alive with parties and celebrations. But for four teenagers life is about to change forever, when Penny crashes her car, killing herself and leaving her twin brother Hobson in a deep coma. Penny's boyfriend Jake and her best friend Demeter escape physical injury. But the real scars lie much deeper than that. And while Jake's family try to take him away from the memories by moving to the west coast of Australia, Demeter has no such opportunity, and finds herself in an unstoppable spiral of self-destruction. Furthermore, as the details of the accident continue to emerge, questions are raised by all those affected. Do the roots of the accident lie further in the past than they seem? Is true healing possible, in even these most devastating circumstances? And can true friendship ever really die?