Shen Yan, a young man who dropped out of school and returned to his hometown, faced the predicament that his old house was about to be acquired and his grandmother's medical expenses were nowhere to be met. He made a bet to repay 80,000 yuan in three months, and shouldered the increasingly declining shadow puppetry craft. With only a box of donkey hide and a few oil lamps, he broke the inherent form of shadow puppetry, turning shadows into light. While fighting against the temptation of traffic, he re-gathered his scattered family. After going through a rainy night rescue, provincial capital exhibitions, and financial choices, he rejected brand buyouts and guarded the true name of the craft. Relying on shadow puppetry to lean closely on each other again, the whole family finally understood that whoever lights the lamp in their heart is the protagonist of life.