New nurse Mai Shiina is kidnapped by a discharged patient and restrained on an examination table, left completely defenseless. Not only is her vagina probed and exposed with a speculum, but she is also forced to undergo pubic shaving. With no chance to resist, a vibrator is thrust inside her, followed by intense anal penetration, as the man's depraved training session continues without mercy. The film captures Mai's ongoing subjugation, vividly portraying her humiliation and helplessness.