At the end of the Qing Dynasty, Li Guolou returned to China after studying abroad. He accidentally stepped into the six doors and became a detective. He solved the case and wrote a legend in the confused world! The main line of the article is based on the life experience of the protagonist. It is a trajectory with a strong legendary color. The sub-line runs through the whole story with the protagonist solving the case. The two lines run through together, and will collide with fierce sparks! In a world where either the master or the slave, Xiao Lizi will fight for glory for the country. Foreign girl, walking in the Infernal Affairs between black and white, with a strong taste of ridicule, people want to watch it after laughing, please appreciate it.