A warm June evening a local tradition: the students of Nantucket High have gathered for a bonfire on the beach. But what begins as a graduation night celebration ends in tragedy when Penny Alistair's car crashes leaving her dead & her twin brother in a coma. The other passengers Penny's boyfriend Jake & her friend Demeter are physically unhurt
- but the emotional damage is overwhelming. As summer unfolds details of that devastating night continue to surface. Questions linger about what happened before Penny took the wheel & startling truths emerge about the survivors & their parents: revelations of secrets kept promises broken.. .and hearts betrayed.