After a catastrophic event involving mana, Rudeus Greyrat and his spirited pupil Eris Boreas Greyrat find themselves transported to the Demon Continent. With the addition of Ruijerd Supardia, the ex-chief of Superd's Warrior group, they unite to establish the formidable adventurer team known as "Dead End." Gaining recognition as they traverse the continent on their way back to Fittoa, they cross paths with Kishirika Kishirisu, the esteemed Demon World Emperor, whom Rudeus rescues following guidance from the enigmatic deity Hitogami. Grateful, the Emperor bestows upon Rudeus an unusual power. While Rudeus hones this newfound ability, unlocking endless possibilities, unforeseen perils emerge, challenging their journey home.