At a certain hot spring inn, many female guests travel alone, particularly gyaru girls from Tokyo who've come seeking escape after heartbreak. Especially late at night, numerous women check in, some visibly uneasy and unable to hide their discomfort. Targeting these vulnerable moments, a cruel nighttime rape scheme is set into motion. Under the cover of darkness, the girls struggle violently, yet gradually awaken to their own perverse pleasure as their bodies betray them.