After eliminating a human trafficking stronghold, private investigator Ko Ching discovers a captive Suna - a girl who is unusually calm despite being bound by ropes. While claiming to be a victim, Suna proposes a dangerous plan: to infiltrate the organization's headquarters with Koharu disguised as a bitch. In order to show her sincerity, Suna takes a seven-day poison given by Koharu. During the rigorous restraint process, Ko Ching is dressed in a straitjacket, gag ball, ru clamps, and finally secured to a metal restraint frame in a modified vehicle. As the vehicle lurches, the metal posts continue to invade her body, and Suna's skillful maneuvers hint that this victim may have another identity. A deceptive infiltration operation unfolds, blurring the line between hunter and prey.