Qiao Xiaoqiao accidentally entered the ghost wall to catch the escaped ghost, and was frightened to death by a black cat. He was sent to the underworld. Because his life was not over, he was sent back to the world by Po Meng, and got the Yin Walking Card that can kill ghosts.
The black cat who was expelled from heaven, in order to find the murderer of his master, relied on Po Meng as his little brother.
Shen Xiaojun, a black cat who will be struck by lightning if he uses immortal magic in the human world, Qiao Xiaoqiao, who is extremely afraid of ghosts but has to catch ghosts in exchange for virtue to replenish his lost life in the underworld. In the human world, he interacts with the naive weasel Huang Wuyue, the four-tailed fox Jiujiu who is addicted to alcohol, and Han Guli, a Miao girl who knows voodoo. Wearing a cheap turtle brand smart watch, holding a ghost card, and carrying a soul-killing knife, the group embarked on a funny journey of ghost hunting to find the murderer.
