As the first runner-up of the Children's Singing Contest, middle-aged Xi is offered the job of hosting the contest. Standing in the familiar place, Xi's dream of being a singer stirs up in his heart once again. At the same time, Xi's mother comes to the auditorium where the contest is being held. What is Xi's mother looking for? This auditorium will witness the resolution of misunderstandings between a frustrated middle-aged man and a mother with Alzheimer's disease, as well as the release of regrets between the mother and the son.