Valerie lives alone in a large Victorian house that is rumored to be haunted. Due to memory problems, she asks her adult son to move in with her for a while, but it is not the reunion she expected. Hudson is taciturn, gloomy and often disappears. The neighbors are not happy about his return, so when a young woman is found murdered in a house on a nearby street, suspicion immediately falls on him. Valerie tries to protect her son, but as the investigation progresses, she wonders: does she know him that well? It's terrible for a mother to even think about it... but what if she gave birth to a monster?