Chanyo Ta, a muscular and arrogant personal trainer at a gym, was feared by male members for her harsh, brutal training methods and unreasonable violence. With a sadistic personality and twisted sexual desires, she tormented her trainees, forcing them naked and filming them. However, one trainee managed to secretly record a lewd video of Chanyo Ta and the gym's CEO. The humiliated trainees then banded together, vowing revenge and beginning the training of the muscular woman—turning her into their sex slave and cumdump.