雨夜，一只流落街头的小黑猫，被少女罗小白（山新 配音）带回家，起名罗小黑。罗小黑不是一只普通的猫咪，它极通人性，会上厕所，不吃猫粮，长长的尾巴甚至会分裂成一个个名为“嘿咻”的不明生物体。另一方面，名为“谛听”（皇贞季 配音）的神秘人物，发动手下三匹会幻化成鸟的狼，搜寻着罗小黑的下落。不久，罗小白带着小黑到乡下探望堂哥阿根和爷爷，由此发生了种种离奇玄幻事件。

When cat spirit Luo Xiaohei's home is deforested by humans, he must find a new one. He runs into a group of other spirit creatures who take him under their wing with dreams of reconquering the land they say is rightfully theirs. However, they run into a human known as Wuxian who separates Luo Xiaohei from the other spirits and the two go on a journey, with the cat spirit learning to control his abilities as well as forming his own thoughts on whether or not he should ally with the spirits or the humans.