The Jade Rabbit fairy Yue Tuantuan accidentally enters the demon realm while trying to avoid a matchmaking arrangement and is brought back to the Demon Palace by the cold-faced Demon Lord Xuan Jin. With her love of food and playful antics, this little rabbit fairy gradually fills the once-cold Demon Palace with warmth. Tuantuan uses the power of moonlight to help Xuan Jin heal his wounds and cultivates spiritual fields, transforming life in the demon realm. When her childhood sweetheart, the immortal lord Yun Zhao, appears, Xuan Jin finally learns to bravely protect his true feelings. The two find their way to a sweet and happy romance.