Original Webtoon:
Naver Webtoon, Naver Series

Tae-In, an amusement park manager, is visited by a strange guest, Jesol, who calls herself an "elf." She demands her father's belongings and steals his necklace. Then, unidentified people kidnap Tae-In. They claim he's a descendant of the "elves," a minority ethnic group in Korea, and even among them, a deity, Kangsan. They ask Tae-In to help the "elves" migrate...