Maggie has witnessed impossible things. But no one believes her, and now her family has taken her away to spend the winter upstate in a remote, freezing farmhouse.

Bored and angry, Maggie and her younger sister Kate start to play tricks: rapping on the floorboards above their parents' bedroom, cracking their toes under the table, and telling tales about noises in the night. Then the house starts to make sounds of its own. Neither Maggie nor Kate can explain it, but it seems as though someone – or something – is trying to speak to them...

Inspired by the incredible true tale of the Fox Sisters, the girls who made their fortune in nineteenth-century America by speaking to ghosts.