A young family moves into a modest home on Ash Tree Lane, only to discover something deeply unsettling—the inside of the house is larger than the outside.

Neither Pulitzer Prize-winning photojournalist Will Navidson nor his partner Karen Green was ready to confront the terrifying consequences of this impossibility.

That is, until the day their two children vanished within the house—and the echoes of their voices returned with a different story. A story of shadowed creatures, an ever-expanding void behind a closet door, and a monstrous growl that would soon rip through the walls, devouring every last dream they once held.