A female spy with the code name "Iroha" belongs to the "Red Arrow", an all-female intelligence organization secretly established by the National Security Investigation Bureau to stop increasingly violent crimes. Her well-trained body, supple movements, and excellent infiltration skills are appreciated, and she infiltrates to solve the disappearance of a female investigator. However, what awaits her is a cruel hell of torture with iron shackles. She is unable to move, her lust is exposed, and she is forced to orgasm. Screams of despair and pleasure echo through the air.