Pretty immature 28-year-old Dayao lives on a farm but works in the city just like his pregnant wife Tiantian. He is 1.000 % into nature; she is adamant on buying a flat in the city, despite having no money. During an accident on the construction site where he works, he deliberately hurts himself and wakes up completely changed, back into childhood, with no memory.
As Dayao slowly recovers at his mother’s, he clearly is not unhappy: he spends his days speaking to animals and contemplating nature.
Meanwhile, his wife works a lot and sleeps at a young girl’s place who shows her freedom the city can offer. When Dayao’s mum dies, Tiantian brings him to the city. She gets fired and gives birth to a boy. Even if Dayao barely speaks, he can now take care of himself – yet Tiantian does not want to lose the liberty she just gained as a woman and leaves for Shanghai.
Dayao leaves as well with his son, to live on a mountain. A year later, a busy Tiantian can finally take a vacation and go in search of her family.