The story centers around the Graham family: single mom Lynn, her teenaged son Danny and two younger children Ivan and Natalie. After a messy divorce, Lynn decides to leave Santa Monica, California for her native country of Australia with her three American-born sons. They move into a crumbling old house on the Gold Coast. The house definitely needs work but one thing it has going for it is a huge backyard with a nice little cubbyhouse at the edge of the property. One day while visiting the town village, Danny is informed by one of the locals that the cubbyhouse in the yard is cursed with "pure evil" and that 30 years ago 2 kids were slayed by a devil worshipper in same said house. Danny dismisses this talk as nonsense until he starts noticing awfully strange things happening in that new backyard of his. Hmm maybe there's a good reason why the house was abandoned for so many years...