Following the death of their father, a brother and sister are sent to live with a foster mother, only to learn that she is hiding a terrifying secret.

Curtis Pike and his family are selected to test a new home device: a digital assistant called AIA. AIA observes the family's behaviors and begins to anticipate their needs. And she can – and will – make sure nothing – and no one – gets in her family's way.

When tech billionaire Slater King meets cocktail waitress Frida at his fundraising gala, he invites her to join him and his friends on a dream vacation on his private island. But despite the epic setting, beautiful people, ever-flowing champagne, and late-night dance parties, Frida can sense that there’s something sinister hiding beneath the island’s lush façade.