Two delinquent employees, constantly scolded by their department chief, become obsessed with Rika, the office lady who always gets reprimanded. One day, they discover that Rika and the chief have been secretly involved in a relationship. Driven by their desire for Rika and revenge against the chief, they orchestrate a power outage at the office, trapping everyone inside. They restrain Rika in front of the chief and brutally assault her. She struggles desperately, but as the men's intense stimulation overwhelms her, her body gradually betrays her, writhing in helpless pleasure. Witnessing her humiliation, the two men grow increasingly aroused.