After believing she spotted her son in a traveling caravan, a distraught mother returns to the island of El Hierro, where son disappeared three years previously.
After a series of disturbing supernatural events in his home, Joel, a young single father, comes to suspect that his young son may be possessed. 约尔是一个单身父亲，在他的家中出现了一些列超自然灵异事件滋扰以后，他开始怀疑自己的小儿子是否被附身。
