During a heatwave, office workers are stuck working overtime with their female boss, Emiko Koike, as the air conditioning breaks down. When repairmen finally arrive, tensions rise due to complications, causing Emiko to grow increasingly irritated. Suddenly, the entire building loses power, trapping everyone inside. Frustrated and desperate, the repairmen turn on Emiko and violently assault her. In the chaos, their desires spiral completely out of control.