Shaokang and Xiaolei are inseparable friends. However, on the eve of elementary school graduation, Xiaolei's family suddenly moved, and his parents even had to transfer him to another school. In order to maintain friendship, Xiaolei firmly opposed transferring schools. He rode a bicycle for forty minutes every day between his old and new home, no matter what the weather, he was never absent.
Shaokang felt sorry for his friend's hard work and often visited Xiaolei in his new home. The two shared their thoughts in the cramped old house. But Xiaolei's parents are extremely resistant to this friendship, and there are always unspeakable weirdnesses in their words and deeds.
After entering junior high school, although they were assigned to different classes, the friendship that took root in the childhood yard became the warmest force against the cold conspiracy.
On a rainy day, Shaokang accidentally bumped into Xiaolei's mother handing her son a glass of "cool boiled water". Green foam appeared after the glass fell to the ground. With the knowledge he learned in science class, Shaokang recognized this as the dangerous reagent "The Hidden One". Under questioning, Xiaolei's parents finally revealed their identities.
Purpose: Using the pure friendship of two teenagers as a glimmer of light, it illuminates the systemic malice and manipulation hidden under the illusion of daily order, adult rules, and family affection, and demonstrates individuals' persistence and resistance to sincere connections in a disciplined world.