This literary porn drama set at secluded Hokkaido hot springs depicts coercion and assault involving adult innkeepers, mature attendants, and a mysterious female guest with hidden masochistic desires. In the late 1950s storyline, con men lure a compassionate innkeeper and alluring attendants into the filming of abusive underground porn. During the later bubble-era story, men posing as tax officers threaten an innkeeper over alleged evasion, assault the mature attendants used for naked guest entertainment, film the abuse, and target a female guest as well. Seven women in their thirties through sixties appear in this dark, novel-like hot-spring drama.