The sun is dappled and the years are bubbling. In a corner of the world, there exists a group of sun people. They were born towards the sun and migrated with the sun. Their living habits are the same as those on earth, but the sun is very harsh. This family has experienced a long cold period since it was born on the earth. In order to avoid the cold, they stayed underground for a long time without seeing the sun. The harsh environment gradually evolved this family into "sun people" who chase light and shadow, working at sunrise and resting at sunset. Whenever the sun sets, they must go home and lie down, because after the sun sets, they will fall into a deep sleep, and wild beasts will attack them at any time. They are chasing the sun and escaping from the world of earthlings.
A little girl in the village, Dili, can move freely at night. She loves adventure and often explores in the woods while the adults are sleeping. Together with her good friend Sissi, she accidentally fell into a well and Sissi turned into a cat. Unbeknownst to Dili, she named the cat Xingxing. Accompanying Dili to grow up in his own way, Xingxing also continued to explore in the forest to find a way to turn himself back into a human, only to find that there are dangers everywhere in this forest. Their story has just begun. The mystery of Dili's unique life experience has gradually been revealed, and the conflicts with the people on earth have also continued to escalate...
Concept: Growth, independence, adventure, fantasy, as people in the sun explore their secrets on earth
