The CCG launches a massive, heavily armed military assault against the Aogiri Tree's hidden fortress, turning the district into a chaotic, multi-sided war zone. Amidst the heavy gunfire and exploding kagune, the Anteiku rescue squad infiltrates the building to locate Kaneki. However, they are unaware that Kaneki is currently experiencing a living nightmare inside a hidden chamber. The sadistic psychopath Yamori subjects Kaneki to days of brutal, relentless psychological and physical torture, forcing him to count backwards from 1000 by sevens while severing his limbs repeatedly. The unimaginable agony pushes Kaneki's mind to an absolute breaking point, forcing a profound internal awakening.