Nana, a genius investigator, was selected for a special mission against toxic drugs. Her mission this time is to infiltrate a hideout where illegal experiments are being conducted in secret. However, due to a clever trap and the betrayal of her comrades, she is forced to inhale a powerful aphrodisiac gas. When she wakes up, she is restrained by a guillotine restraint device prepared just for Nana. Even though she is skilled in martial arts, her female body is not even able to move, and she is forced to take the out-of-control test subjects' deep throating one after another! Nana's resistance, relying on her pride and spirit, is in vain, and her whole body is polluted with a large amount of sperm contaminated by the aphrodisiac gas. Every time she inhales the miasma, her consciousness fades, and she is defeated and climaxed many times by the hated traitor's dick! She falls into a hell of drug-induced gangbang in the enemy's nest where no help will come!