A decaying mansion serves as a cage for Chan Sau Ying, a woman physically wasting away while her sadistic husband squanders their remaining status. The arrival of a young, mysterious servant shifts the power dynamics within the shadowed hallways. Desperation breeds a murderous pact between the two women to end the domestic tyranny once and for all. What follows is a descent into hauntings, double-crosses, and a frantic struggle against the vengeful spirits of the wronged.