While peacefully spending the weekend at home, strangers suddenly burst out of the bathroom. The protagonist couple quickly escapes into a small room to avoid the threatening foreigners wielding weapons. To check the situation in the living room, they cautiously open the door again, only to find... a completely different space beyond the door, not their own living room! In this perilous situation where each opened door leads to a different space, can they safely rescue their daughter who is stranded alone?