After confronting demons aboard the Infinity Train, Tanjiro, Zenitsu, and Inosuke must face Enmu, the first lower moon. But even if they manage to defeat him, Muzan Kibutsuji's minions are still running rampant! Tanjiro must continue to improve his abilities and power. The secret of the Sun Dance (Hinokami Kagura) will allow him to become stronger in hopes of being able to overthrow the demonic powers.