Meg, a female ninja who trained deep in the mountains of Iga, resolves to follow a righteous path—aiding the good and punishing the wicked. Descending into the big city, she meets a young researcher well-versed in science and technology. When his research data is stolen by ZA, Meg infiltrates their hideout to recover the blueprints. However, she's ambushed by ZA soldiers and knocked unconscious with a stun gun. Thus begins a tragic ordeal. Dressed in a unique costume, Meg draws the twisted curiosity of the ZA members, who begin taunting her. They sniff every part of her body—her chest, crotch, the soles of her feet, even her boots. "I don't stink... don't you dare smell me...!" she defiantly resists. But bound and helpless, she's completely at their mercy as they grope and molest her entire body. At that moment, ZA's boss, aroused by her suffering, proposes a sinister scientific experiment. Meg seizes the chance to escape. As a result, the boss mutates into a monstrous creature and begins hunting her for revenge. Subjected to forced massage sessions and brutal assaults, the beautiful female ninja Meg is ruthlessly broken down by the filthy middle-aged ZA men, her pitiful state striking terror into all who witness it.