When Molly and Michael’s mom remarries and they have to move with her new husband, Dave and his daughter Heather to the country, they are not overjoyed. This has spoiled their summer plans with friends. Living in the country is boring compared to the big city but they try to make the best of the situation by exploring their new environment. The family’s new home is an old coverted church which comes with its own graveyard. Molly notices a change in Heather’s behavior after a visit to the graveyard and the discovery of a small tombstone. Strange things begin to happen around the house and Heather blames both Michael and Molly. Tensions begin to rip the family apart. Heather continues to manipulate the adults and threaten her new siblings with “Wait till Helen comes!”