Legend has it that there are many Jiang Hu forces hidden in Mu Yun City. Meng Sanxi, a martial arts master, is investigating the case of a friend who was murdered by an assassin organization allegedly based out in the city. At Mu Yun City, Meng Sanxi meets three other people who share the same mission as him. But to continue their investigation, they need money. So, they opened a convenience store to make a living and also to fund their investigation.