In the glow of their children’s exciting first year of college at a small private school in Northern California, five families plan on a night of dinner and cocktails for the opening festivities of Parents Weekend. As the parents stay out way past their bedtimes, their kids—five residents of Campisi Hall—never show up at dinner.

Twenty-two years ago, Claire Campbell’s older sister, Natalie, disappeared shortly after her eighteenth birthday. Days later, her blood was found in a car, a man was arrested, and the case was swiftly closed. In the decades since, Claire has attempted to forget her traumatic past by moving to the city and climbing the ranks as an investigative journalist... until an unexpected call from her father forces her to come back home and face it all anew.

For nearly a year, Beth has been planning for her escape. She's thought through everything - a new look, new name and new city - because one small slip and her husband will find her. A couple hundred miles away, Jeffrey returns home from a work trip to find his wife, Sabine, is missing. Wherever she is, she’s taken almost nothing with her. Her abandoned car is the only evidence the police have, and all signs point to foul play.

Haven Ambrose, a trailblazing nautical archaeologist, has come to the sun-soaked village of Positano to investigate the mysterious shipwrecks along the Amalfi Coast. But Haven is hoping to find more than old artifacts beneath the azure waters; she is secretly on a quest to locate a trove of priceless gemstones her late father spotted on his final dive. Upon Haven’s arrival, strange maelstroms and misfortunes start plaguing the town. Is it nature or something more sinister at work?

Restauranteur Paddy Swann was the life of the party until the day a man pushed him in the path of an oncoming train, leaving his twenty-something daughter Ash and wife Nina devastated. Shortly after Paddy’s funeral, the two women receive a surprise in the mail: a note and package from Nick Radcliffe, an old friend of Paddy’s, and a nondescript lighter that once belonged to him decades ago. This unexpected gift draws Nick and Nina closer together—much to Ash’s dismay.