Anna abducts her son Anders from an abusive father and moves to an abusive place. She is very afraid that her ex-husband will find them. For his son's safety, he decides to buy a baby monitor that can be placed on the bed before bed. However, over time, strange sounds and screams begin to come from this radio. Anna believes possible noises from another apartment may have been the result of the murder of a child. On the other hand, Anders has found a new, mysterious and strange friend at his new school. Does this new friend know anything about the murder? Why are there traces of blood in Anders' drawings? Do the voices they hear belong to this world?