Ten years ago, a tragic accident tore through a community. Ever since, the nine survivors - just teenagers at the time - have met on the anniversary to remember those they lost. They made a promise to keep each other safe from harm. For Cassidy, always the outsider at school, this group has felt almost like friendship. But this year, their reunion is overshadowed by death and the disappearance of one of their own. As the week unravels, Cassidy begins to fear something darker than survivors' guilt has bound them together. Was their pact to protect one another a promise, or a threat?

Ten years after graduation, Jessica Miller has planned her triumphant return to her Southern, elite Duquette University, down to the envious whispers that are sure to follow in her wake. Everyone is going to see the girl she wants them to see - confident, beautiful, indifferent. Not the girl she was when she left campus, back when Heather Shelby's murder fractured everything, including the tight bond linking the six friends she'd been closest to since freshman year. 

Ten years after graduation, a group of friends plan a reunion in a remote house in upstate New York. It isn't a bachelor party, as they've led one of their friends to believe, but instead an intervention for an escalating drug addiction. They lost one member of their friendship group in college, and they'll do anything to make sure that doesn't happen again. But from the moment they arrive, something doesn't feel right.

Allie, Stacie, Diana, Emily and Gail have been by each other's sides for as long as they can remember. The Fierce Five. Best friends forever. But growing up has meant growing apart. And little white lies have grown into devastating secrets. When Gail invites the increasingly estranged friends to reunite at her Scottish cabin, it could be the opportunity to mend old wounds and heal the cracks in their friendship. 

Ten years ago, Abigail Lovett fell into a job she loves, managing The Passage Inn, a cosy, upscale resort nestled in the North Carolina mountain town of Cutter's Pass. Cutter's Pass is best known for its outdoor offerings—rafting and hiking, with access to the Appalachian trail by way of a gorgeous waterfall—and its mysterious history. As the audiobook begins, the string of unsolved disappearances that has haunted the town is once again thrust into the spotlight when journalist Landon West, who was staying at the inn to investigate the story of the vanishing trail, then disappears.