The fox fairy Yuhua who accidentally got into trouble was hunted by the demons and the gods. He was likely to be caught wherever he went in the three realms, so he had to steal the moonlight treasure box and run away.
But she didn't expect that the Moonlight Treasure Box malfunctioned and instead of teleporting her to where she wanted to go, she started a fast-traveling journey in various small worlds.
The first time she traveled through time, she went to "Huan Zhu Ge Ge". Xiao Yanzi looked at her, who was so beautiful that she couldn't change her gender, and said, "Should I call you the fairy brother or the fairy sister?"
The second time she traveled through time, she traveled to "A Dream of Red Mansions"...
The third time she traveled through time, she traveled to "Love is Deep and Rainy"...
For the Nth time, she traveled to "Journey to the West" and met the four Tang Seng who had not yet become Buddhas. Tang Seng became her master, Bajie became her good friend, Sha Seng became her little fanboy, and Sun Wukong became her... Sister-in-law?