Her family's cottage on the New Jersey shore was a place of freedom and innocence for Julie Bauer—until her seventeen-year-old sister, Isabel, was murdered.

It's been more than forty years since that August night, but Julie's memories of her sister's death still shape her world. Now someone from her past is raising questions about what really happened that night. About Julie's own complicity. About a devastating secret her mother kept from them all. About the person who went to prison for Izzy's murder—and the person who didn't.

Faced with questions and armed with few answers, Julie must gather the courage to revisit her past and untangle the complex emotions that led to one unspeakable act of violence on the bay at midnight.