Set in the year 1945 in Gyeongseong, the historical name for Seoul during a difficult period of colonial rule, this series takes place in a time filled with uncertainty, hardship, and social tension. As the city struggles under strict control and political oppression, everyday life becomes a constant battle for survival. Amid this harsh reality, an ambitious entrepreneur and a determined sleuth find themselves drawn together by circumstances that neither of them expected. The two characters come from very different worlds, yet both are forced to confront the dangers surrounding them. While trying to protect their own lives and those they care about, they begin investigating a series of mysterious and frightening events occurring in the city. Their search for answers leads them toward a terrifying truth connected to a monstrous creation born from human greed and cruelty. As the story unfolds, the pair must navigate a city filled with fear, secrets, and hidden threats. Facing both human enemies and an unnatural danger, they struggle to survive while uncovering the dark consequences of ambition and power. In this tense and dramatic setting, their fight becomes not only a battle for survival but also a confrontation with the darker side of humanity.