A former banker, his actress wife, and their spirited daughter book a vacation at an isolated modern home in the Welsh countryside where nothing is quite as it seems.
The Barretts' normal suburban New England life is torn apart when their teenage daughter shows signs of acute schizophrenia, reluctantly leading them to be the subjects of a reality show. 15 years later, Merry faces her haunting past.
Following the events at home, the Abbott family now face the terrors of the outside world. Forced to venture into the unknown, they realize the creatures that hunt by sound are not the only threats lurking beyond the sand path.