This story follows a cop in Shanghai during the 1930s. His department is overrun with corruption, while gangsters rule the city via the opium trade.This story follows a cop in Shanghai during the 1930s. His department is overrun with corruption, while gangsters rule the city via the opium trade.This story follows a cop in Shanghai during the 1930s. His department is overrun with corruption, while gangsters rule the city via the opium trade.