Anna and her eight year old son Anders are under the witness protection program following a difficult relationship with Anders’ father. They move into a large apartment complex. Anna becomes overprotective of her son and even buys a babycall to keep track of him. Soon, strange noises from other apartments appear on the monitor, and Anna overhears what might be the murder of a child. Meanwhile, Anders’ mysterious new friend starts visiting at odd hours, claiming that he has keys for all the doors in the building … Does this new friend know anything about the murder? And why is Anders’ drawing stained with blood? Is Anna’s son still in danger?