Now, let's begin the experiment... Eleven former students, both male and female, are gathered by their former teacher for a class reunion and confined in the school building for three days! The boys who play the role of guards watch over the girls who play the role of prisoners! Taking advantage of the situation where the prisoners cannot resist the guards, the boys attack the girls! They have no choice but to accept being raped in order to escape alive... They are deprived of their freedom of movement with sleeping pills, numbing drugs, and aphrodisiacs, and are played with by the boys! The bonds between the classmates, who are cornered and placed in extreme situations, gradually crumble...