Mio is a widow who took over the management of the factory from her late husband. He had a ruthless and ruthless personality and forced his factory workers to do hard work. One day, Mio insults Hamura, a factory worker who made a fatal mistake. However, the workers' anger explodes and they tie up Mio and rape her! Mio resists in vain and ends up submitting to them as their female dog for sex.