影片改编自他多年前经历的真实事件。特拉沃尔塔在片中饰演一名狂热粉丝，他对偶像(戴文·萨瓦饰)的迷恋几乎摧毁了对方的生活。

　　The story follows a struggling young couple chasing the American dream only to realize their worst nightmare when they discover a demonic spirit in their new home. Mammon is the biblical word for the worship of wealth, and the couple discover that getting rich can come at a hefty price.