The game company designer Yuan Dabao is a single father, and his son Yuan Xiaobao has a very different personality. This contrast makes the feelings of the father and son of the two people often "smothered." In an accident, the two were exchanged by the mysterious magician.

Zha, a top student with a high IQ, goes on a journey with Mo, a professional debt collector and sometimes hooligan, in order to face down her own neurosis, as well as cure Mo of his extreme insomnia.