Outside is dangerous... but inside is terrifying in the heart-pounding new thriller from producer J.J. Abrams that's a companion sequel to Cloverfield.

Waking up from a car accident, a young woman finds herself in the basement of a man who says he's saved her life from a chemical attack that has left the outside uninhabitable. But as his increasingly suspicious actions lead her to question his motives, she'll have to escape in order to discover the truth.

But she is unaware of what awaits her outside...