Gyeongseong Creature Season 1 plunges viewers into the dark heart of Japanese-occupied Korea in 1945, mixing historical horror with a terrifying sci-fi premise. The story revolves around Jang Tae-sang, a wealthy and influential pawnshop owner known for his ability to uncover information, and Yoon Chae-ok, a resourceful tracker dedicated to finding her missing mother. Their paths intertwine when Tae-sang is coerced by the Japanese police commissioner to find his missing mistress, leading him to cross paths with Chae-ok and her search for her mother.