After years of avoiding each other, Daisy Darker’s entire family is assembling for Nana’s 80th birthday party in Nana’s crumbling gothic house on a tiny tidal island. Finally back together one last time, when the tide comes in, they will be cut off from the rest of the world for eight hours. The family arrives, each of them harboring secrets. Then at the stroke of midnight, as a storm rages, Nana is found dead. And an hour later, the next family member follows…

It’s the opening night of The Manor, the newest and hottest luxury resort, and no expense, small or large, has been spared. The infinity pool sparkles; the “Manor Mule” cocktail (grapefruit, ginger, vodka, and a dash of CBD oil) is being poured with a heavy hand. Everyone is wearing linen.

Since the dark events that scarred her childhood, Kier Templer escaped her hometown and her twin to live her life on the road. The siblings have never lost contact until, on a trip to a Portuguese national park, Kier vanishes without a trace. Detective Elin Warner arrives in the same park ready to immerse herself in its vast wilderness–only to hear about Kier’s disappearance, and discover a disturbing map she left behind. The few strangers at an isolated campsite close ranks against Elin’s questions, and the park’s wild beauty starts to turn sinister.

Helen Zhang hasn’t seen Grant Shepard once in the thirteen years since the tragic accident that bound their lives together forever. Now a bestselling author, Helen pours everything into her career. She’s even scored a coveted spot in the writers’ room of the TV adaptation of her popular young adult novels, and if she can hide her imposter syndrome and overcome her writer’s block, surely the rest of her life will fall into place too. LA is the fresh start she needs. After all, no one knows her there. Except…

Erin is a documentary filmmaker on the brink of a professional breakthrough, Mark a handsome investment banker with big plans. Passionately in love, they embark on a dream honeymoon to the tropical island of Bora Bora, where they enjoy the sun, the sand, and each other. Then, while scuba diving in the crystal blue sea, they find something in the water....