On a sunny day, Wolffy and Weslie on the green grassland, they start a battle of wits and courage around the captured Lazy Goat. At the critical moment, the Wolf Castle shakes violently, and is then inexplicably transported to an amusement park in the human world. In order to protect Ashitaka's family, the village headman uses a machine to transform them into humans. The unfamiliar human world makes them feel both strange and panicked, and they make countless jokes as a result. However, they discover a serious problem: their precious son, Ash, seems to be lost with them. On the other hand, Mr. Pi, an evil businessman who is planning to bring Wolf Castle to the human world, is brewing a series of evil plans full of ambition.