A young girl, Tong En, went to play at her grandmother's house in the forest, but unexpectedly entered the fantasy forest through a mysterious door. She was surprised by the beautiful and strange creatures there.
At the dinner on the mountain top, Tong En was embarrassed by all living creatures because of his status as an outsider, and felt isolated and helpless. At this time, Mingyu, a girl in white, stood up to defend her and expressed her willingness to help her find her way home.
In order to realize this wish, Mingyu accepted the challenge issued by the King of the Mountain and Forest. Tong En was grateful for Ming Yu's rescue and decided to complete the mission together with Ming Yu. After going through hardships, they finally achieved their goal, and accidentally learned the secret of the fantasy forest on the way...
Mission: Friendship and mutual help, growth and self-discovery