An emotionally-scarred woman flees her abusive husband with their 8-year-old son, but finds her sanity slipping while suffering a series of terrifying hallucinations in this dark thriller from Norway. Anna suffered under her tyrannical husband for far too long, and now she's determined to give their young son a better life. Fleeing her home with her child clutched close, she moves them both into a massive apartment complex where they can never be found. In order to keep a close watch on her son, she places a baby monitor in his room and leaves it on at all times. Meanwhile, the monitor seems to begin picking up signals from other parts of the building. Then one day Anna hears what she believes to be the sound of a young child being murdered over the monitor. Could it be that Anna's mind is playing tricks on her, or has this desperate mother just awoken from a real life nightmare to find herself in a living hell with no hope for escape?