Sarah O’Neill and her shy and arachnophobic son Christopher ("Chris") move to the Irish countryside. While driving home, Sarah and Chris get into a car accident when she almost hits an old woman named Noreen Brady standing in the middle of the road.

After returning home, Sarah and Chris have an argument about Chris' father and Chris runs into the forest. Sarah follows Chris and finds him near a large sinkhole. At a dinner party with friends, Sarah's friends recount the tale that Noreen started to believe her son James was not her real son and is rumored to have murdered him with a car.