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.
Forensic doctor Kong Qiqi wakes up in ancient times with fragmented memories. She discovers that solving cases helps her recover them and embarks on a journey of investigation. Along the way, she meets Ninth Prince Mu Zhixi, who bears a striking resemblance to her ex-boyfriend. As they unravel hidden conspiracies, including the poisoning that weakened Mu Zhixi years ago, their connection deepens, leading them to uncover long-buried secrets together.