In a society of people with animal characteristics, Belle Lablac stands out as the only person with no animal features at all. Curious of her origins, Belle leaves her hometown and heads to the city of Schubertland to be awarded the status of Nomad by Schubertland's ruler, King Rawhide. Through the journey, she is trained by the legendary swordsman Sian Lablac. Unfortunately for Belle, through a complication, she is unable to hurt others with her legendary sword Runding. The only choice to best her opponents in battle now is to break their swords, which is heavily looked down upon. Though ostracized for her appearance and hated for her disregard of societal norms, Belle stays resolute as she sets off on a perilous journey to find her rightful place in the world.

There is a tower that summons chosen people called Regulars with the promise of granting their deepest desires. Whether it be wealth, fame, authority, or something that surpasses them all—everything awaits those who reach the top. Twenty-Fifth Bam is a boy who had only known a dark cave, a dirty cloth, and an unreachable light his entire life. So when a girl named Rachel came to him through the light, his entire world changed. Becoming close friends with Rachel, he learned various things about the outside world from her. But when Rachel says she must leave him to climb the Tower, his world shatters around him. Vowing to follow after her no matter what it takes, he sets his sight on the tower, and a miracle occurs. Thus begins the journey of Bam, a young boy who was not chosen by the Tower but opened its gates by himself. They call his kind Irregulars—beings that have shaken the very foundation of the Tower each time they set foot inside it.

The movie is a compilation of episodes 9-13 of the 2017 television series. Riko and Reg descend to the third layer where Riko has her first experience of the Curse. They descend to the fourth layer where Riko's arm is injured by an Orbed Piercer and Reg tries to save her. Nanachi comes to their aid and saves Riko's poisoned arm. In return Nanachi asks Reg to kill her immortal companion Mitty. Nanachi then joins Riko and Reg in their quest to reach the bottom of the Abyss. (Source: Wikipedia)

The movie is a compilation of episodes 1-8 of the 2017 television series with new scenes added for the introduction. It covers the period from when Riko descends into the Abyss with her robot companion Reg, reaching the second layer where they meet the White Whistle Ozen who reveals information about Riko's mother. (Source: Wikipedia)