Minako Kirishima lives alone with her son, Hitoshi. Once a well-behaved boy, Hitoshi's attitude began to deteriorate after he got injured during club practice and could no longer play basketball. His classmates started showing up at their home uninvited, and desperate for her son to return to normal, Minako pleaded with them to stop involving themselves with him. But her words only provoked the students' anger, leading them to brutally gang rape her. Yet this nightmare is only the beginning...