On a full moon night, a ten-year-old girl from a farming family in a remote village is lured by Moosina into a cave in the mountains, where she uncovers the secret about why the mountain demon always plays dirty tricks on children.

At twenty, A Wen, directionless and lacking skills, leaves home after an argument with his father, never expecting to return. Twelve years later, he comes back as a man with a criminal record. Fifteen-year-old Li Ming, a gifted student, is constantly bullied by local thugs because of his close friendship with Wang Yu-ting, the girlfriend of the gang leader. When A Wen saves him from the thugs, Li Ming asks him to be his bodyguard, hoping for protection from further bullying.

In 2016, Taiwan's film and television industry was in a recession. This made life even more difficult for the lowest-level performers, the extras. The story begins with Kehan Zhang, a man who loves acting and works as a full-time extra. He had been working as an extra for three years and paid NTD 500 in cash every time. His daily routine includes searching for various audition opportunities, submitting resumes, and only receiving audition notices every now and then. To fulfill the dream of becoming a leading actor, he decided to venture into the film and television industry in China and started his Don Quixote journey with pals. The documentary also films other actors and actresses - the girl from the south and Brother Long, and how they experienced gender and age limitations in the industry. Besides the stereotypes in the industry, they also faced challenges balancing work and family.

Amid the hubbub of the New Year’s Eve firework display, three youngsters of different backgrounds become roommates in the juvenile detention house. However, they soon come to realize that they could never leave the place for good.