In the face of overwhelming odds, the sorcerer Luck stands firm against a horde of formidable demons. Determined to protect his companions, he sacrifices himself, engaging in relentless combat without rest or respite. Miraculously, Luck defeats the demon commander and prevails, though a decade has elapsed, and his body has regressed to that of a teenager.
Upon his return, Luck reunites with his former comrades, Eric Imgard Mendirival, the hero, and Goran Morton, the warrior. Believing Luck to be deceased, they had honored him as a legendary hero and were preparing to confront the demonic threat anew, unaware of Luck's triumph. Now, seeking a quiet existence, Luck registers as a novice adventurer under the pseudonym Lock and embarks on new adventures with a fresh set of companions.