Mio is a widow who has taken over the management of a factory from her late husband. She is ruthless and heartless, and thoroughly pushes the workers to the limit through hard labor. One day, Mio insults Hamura, a worker who made a fatal mistake. The workers' anger explodes, and they tie Mio up and rape her! Mio, unable to resist, is forced to submit to them as their "bitch dog for sex work"...
