A young couple, Kaia and Andrew, are renovating Kaia's secluded family estate. Their lives are violently disrupted upon the unexpected arrival of Kaia's sister, Christine, and her fiancé, Ira.

Troubled by bouts of sleepwalking and disturbing nightmares, graduate student Sarah Foster goes to her university sleep research center for help. But when she wakes up after her first night of being monitored, the world she lives in