It's their first time meeting May and Peter Folcroft. The elderly couple seem friendly at first, and the house, hidden in the base of the mountains, is full of nooks to explore.
But strange things keep happening. The swing moves on its own. Peter paces around the house late at night and seems obsessed with the lake where his sister drowned. Doors slam and curtains shift when no one is inside. And one room is kept permanently locked.