When a catastrophic hurricane devastates Stone Cove Island, a serene New England resort community, everyone pulls together to rebuild. Seventeen-year-old Eliza Elliot volunteers to clean out the island's iconic lighthouse and stumbles upon a secret in the wreckage: a handwritten, anonymous confession to a thirty-year-old crime. Bess Linsky's unsolved murder has long haunted the island, and the letter turns the town inside out. Everyone who knew Bess is suddenly a suspect. Soon Eliza finds herself in the throes of an investigation she never wanted or asked for. As Stone Cove Island fights to recover from disaster, Eliza plunges the locals back into a nightmare they believed was long buried.