When a young woman named Alice moves to a new city, she learns about a series of disappearances that may be connected to a baffling rumor about mysterious staircases in the city's worst neighborhoods.

Alice has a terrifying encounter in an abandoned hospital; Luke, Louise and Nathan play cat-and-mouse with Robert Peach.

Alice confronts her own incipient madness while Zoe eats with the Peaches.

Zoe discovers there's something else living in the summer house; Alice reaches the point of no return.

Zoe and Alice confront the Peach family.