Reiko is an Iga kunoichi serving a certain feudal lord. Then she receives an order from the village of Iga to betray the lord. Originally, in the village of Iga, it was customary not to serve one lord, but to choose clients based on money. However, Reiko refuses, saying, "Betraying a request once accepted would damage the village's credibility. I cannot tarnish the name of Iga." "Too bad for you, Reiko," her subordinates say, capturing Reiko and torturing her with aphrodisiacs to make her obey their orders. The kunoichi, brainwashed by pleasure, goes crazy with aphrodisiac sex...