Two years after the gruesome events at the infamous "Exitus House," Sophie remains haunted by the unsolved disappearance of her sister, Monique, whose body was never recovered. Driven by grief and frustration over stalled police efforts, Sophie enlists her friend Lena to conduct an independent investigation. The two women break into the abandoned murder house to gather evidence. However, they soon discover that the property is not deserted; a sadistic killer operates within its hidden torture chambers, subjecting them and other captives to extreme physical violence, imprisonment, and sexual degradation.