Yuriko Mogami lives with her husband in a quiet residential neighborhood, leading an ordinary daily life in their detached house. Recently, however, a string of burglaries has occurred in the area, prompting her husband to urge her to stay vigilant. One day, upon returning from shopping, Yuriko notices the front door of her home is unlocked and slightly ajar. Suspicious, she opens the closet to change clothes, only to find a burglar hiding inside. Before she can react, the man pulls her in and traps her within the closet. A cardboard box topples over from the outside, sealing both of them inside the cramped, hidden space. Tension mounts as the situation spirals out of control.