Shanghai in the early 1930s was a city teeming with intrigue and decadence. Amidst this backdrop, Doctor B, a flamboyant physician, invites writer Shimura Yōhei on a late-night excursion to the mysterious Fortune Club. Promising an experience unlike any other, Doctor B leads Shimura through the shadowy streets to a lavish dance hall, a sanctuary for Shanghai's international elite. As the night unfolds, Shimura is mesmerized by the club's opulence and the eclectic mix of patrons. However, a chance encounter with a Portuguese dancer named Kate unveils a sinister secret lurking beneath the surface. Guided by a cryptic hint, Shimura ventures into the dark and eerie basement, where he discovers a hidden world of unimaginable horror—a prison for women ensnared in a web of exploitation and despair. Itō's work critiques capitalist exploitation and the underclass's struggles, challenging the superficial and exoticized depictions of Shanghai by his contemporaries. Through gripping narratives that reveal the exploitation beneath Shanghai's glamorous surface, Itō aimed to counter the prevailing bourgeois narratives and expose the harsh realities of life in Shanghai, presenting a nuanced critique of social inequalities and the revolutionary potential of the city's conflicts.