Humans and demons are supposed to be two borders that can enter the water but not invade the river. However, a mermaid spirit accidentally deposited its essence in a pregnant woman and failed to retrieve it in time. The essence was subsequently absorbed by the born baby and became his own. As a result, a new species emerged between humans and demons: half-demon!
This half-demon is cute, funny, and eccentric. He practices magic and walks with the demon. He travels all the way to the north and south, going through hardships and dangers, and defeats the generals, just to go to Xuanyuan Kingdom to seek the Heaven-Returning Pill to save his mother's life. . .