The story takes place in Songhai City during the Republican era. Behind the city's glamorous facade, undercurrents of danger run deep, concealing countless crimes and secrets. The Great World, Songhai City's largest den of pleasure, appears to be a place of endless entertainment and revelry. In reality, it is where the wealthy and powerful indulge in extravagance and excess, while the dark dealings behind the scenes and the ugliness of human nature are truly shocking.