Yorang is a fox living in heaven with important duties, yet he prefers playing tricks on others and seeking fun all day. One day, heaven hosts a festival celebrating the completion of the "Book of Wishes," a prestigious work capable of removing the black fox's seal. During this event, the very mischievous Yo-rang throws away the valuable book. Consequently, heaven faces a threat from the black fox's dark magic. Yo-rang, responsible for the debacle, searches for the book and meets a boy named "Kang-hyun." Kang-hyun lost his mother at an early age and moved from Seoul to Fox Village with his father. Kang-hyun and Yo-rang search for the book together. However, the black fox attempts to ruin their plan, causing Kang-hyun and Yo-rang to encounter various hardships. In the end, they develop a strong friendship.