When sixteen-year-old Cheng Xiaoman wakes up one morning, she can finally sign parental consent forms for her own activities.
Because she has become a mother.
Meanwhile, her actual mother is wearing her school uniform and getting ready to attend her first math class.
Xiaoman thinks being a mom means she can make her own decisions. Qiu Meijuan thinks going to school has to be easier than running a shop. But one "Whatever you want" from her daughter lands her with sixty bags of snacks to package, while one schedule from her mother manages to offend every one of her daughter's classmates.
"Don't use my face to lecture people. I still have to sit next to her in class next month!"
"Then don't use my name to agree to things all over the place. I'll have to run the shop again when we switch back!"
Thirty days later, their bodies can switch back, but the trouble they've caused won't disappear with them.
So the mother and daughter take turns undermining each other while teaching one another how to be themselves. Meanwhile, Dad grows more and more suspicious: why do these two even argue like they've switched places?
