With a cartload of fur pelts in tow, traveling merchant Kraft Lawrence stops by the village of Pasloe. According to local folklore, centuries ago, one of the villagers made a promise with the wolf deity Holo, who swore to bless Pasloe with bountiful harvests of wheat. Yet, as time passed, such stories became little more than relics of the past. After quickly finishing his business in the village, Lawrence sets out to his next destination. His journey, however, takes an unexpected turn when he discovers a nude, animal-eared girl sleeping among his pelts. Even more surprisingly, the youthful-looking woman claims to be Holo—the wolf of legend. Holo wishes to return to her hometown in the north, and though their first encounter is rocky, she convinces Lawrence to accompany her on her travels. In return, she vows to earn her keep, using her quick wits and lifetime of experience to help her newfound companion in his dealings. As they continue their journey, Lawrence and Holo take advantage of whatever economic opportunities they come across, often landing in situations that put both their business skills and their relationship to the test.

In the Kingdom of Yamauchi, people have the ability to transform into three-legged crows known as yatagarasu. While the men plot over daily governance, women compete for the hand of Wakamiya, the crown prince who was selected as the Kinu, the servant to the Mountain God. Four young women arrive at the court to join the competition, including one named Asebi. While the kind and innocent Asebi sticks out like a sore thumb compared to the other women, the crown prince has to fight for his place in the clan. Despite being born both to a concubine and as a second son, the royal priests still chose Wakamiya to be the Kinu over his older brother. This decision created a rift between the siblings while enraging Wakamiya's stepmother in the process. When Yukiya, one of the teenage sons of the village chief, is sent to the palace to become Wakamiya's new attendant, the prince is not pleased in the slightest. However, Yukiya's presence at the imperial courts is no mere coincidence.

After a series of mighty clashes with Upper Rank Demons, the Ubuyashiki clan prepares for one last battle with the hellish forces of Muzan Kibutsuji. In order to finally defeat the Demon leader once and for all, the clan devises a training camp for the Demon Slayer Corps, one led by the remaining Hashira—the most elite warriors in the organization. Each Hashira forms a specialized exercise that will hone both their own abilities and the skills of the ordinary soldiers. Tanjirou Kamado, a boy at the heart of the brewing conflict, recovers from wounds received in a recent fight. While his half-Demon sister Nezuko is studied by researchers like Shinobu Kochou, Tanjirou embarks to train with the Hashira, seeking mastery in each of their assigned areas of expertise to be best prepared for the coming war—skills vital to Tanjirou, as he has vowed to be the very warrior who will eliminate Muzan for good.