A mysterious calamity, "Honkai," has eroded the world. Humans infected by the Honkai have become mindless, destructive "zombies," posing a tremendous threat to the world alongside the colossal monsters born from it, the "Honkai Beasts." In the city where this stage play has been repeated hundreds and thousands of times, Hua Yi reaches out to Kallen Kaslana, who has sacrificed herself for the cause. "Would you come with me?" "Yes, I would." He receives a firm reply from the girl, and a smile as radiant as a blooming flower. Standing at the pinnacle of human power...