Once upon a time, there was a young boy living in rural China with his grandmother and older brother, since his parents were killed at the hands of imperialists during the war. He lived with them until one day, his brother went missing in Changbai forest, and when he came back he had orange hair, only craved meat, and he kept talking about a fox with an emerald in its mouth. He woke up in the middle of the night to hear his older brother making noise, and when looking, he was fully dressed and about to sneak out. He said to his younger brother that he must go into the forest to live the life he wants, but can never return or tell the truth about where he is going.
In the morning when the boy told his grandmother about his brother, she was shocked. She said that he has been chosen by the fox woman, who has taken him to the forest to live with her in the world of spirits and gods. She told him never to speak about it again, and to only say that his brother ran away, since they were unable to ever speak about the place he has gone.
As he got older, he kept feeling pulled towards the forest, and eventually saw a woman in fancy robes and orange hair beckoning him towards the trees at night. He ran after her into the dark forest, and lanterns suddenly appeared around him. He had entered the world of foxes, where his brother was waiting. He handed him a green stone, and upon touching it he was also turned into a humanoid fox.