The Kanto Hell Earthquake has completely demolished the metropolis. In the aftermath, the Slum King kidnaps girls and sells them as sex slaves. Mari wanders through the devastated landscape searching for her lover, Ken, but she too is kidnapped by them. While she is tortured and trained as a sex slave, Ken rescues her. Ken has become a member of the Slum King's organization. The king sets a condition for him: in exchange for Mari's release, he must kill Violence Jack.