Five contestants have been chosen to compete for ten million dollars on the game show One Lucky Winner. The catch? None of them knows what (or who) to expect, and it will be live streamed all over the world. Completely secluded in an estate in Northern California, with strict instructions not to leave the property and zero contact with the outside world, the competitors start to feel a little too isolated.

When Anna Hartley’s husband, Henry, calls her with a terrible, guilty confession, she can’t believe what she hears. It has to be a bad joke—the mild, predictable artist she married would never hurt a fly, let alone commit murder. But her confusion turns to horror when police find his body washed up on the banks of the Rio Grande.

Neely’s monsters don’t always follow her rules, so when the little girl under her bed, the man in her closet, and the disembodied voice that shadows her every move become louder, she knows she’s in trouble. With a history of mental illness in her family and the suicide of her older brother heavy on her mind, Neely takes a job as a tour guide in the one place her monsters can’t follow—the caverns. There . . . she meets Mila. Mila is everything Neely isn’t—beautiful, strong, and confident. As the two become closer, Neely’s innocent crush grows into something more.

The night of their senior picnic, Scarlett Russo and her best friend Pepper were involved in a car accident that left two of their classmates dead. Afterward, they lied to the police, protecting each other from the consequences. Then Pepper left town and Scarlett never heard from her again.

When Lenna gets a call from her old friend Rhiannon, she is startled; Rhiannon disappeared years ago without a trace. But Lenna is even more startled to learn that Rhiannon has a son and that she lives off the grid with a group of women in a community called Halcyon. Rhiannon invites Lenna, a new mother herself, to join them. Why suffer the sleepless nights by yourself? It takes a village, after all. Lenna decides to go and hopefully repair her relationship with Rhiannon, but as she drives into the desert and her cell service gets weaker, she becomes suspicious.