After his father died in a car accident, Lu Chen rode his old-fashioned Phoenix bicycle around the abandoned railway every day; transfer student Lan Xiaotang sat in the back seat of Lu Chen because he missed the school bus and asked for a long-term ride; Lan Xiaotang always got off the bus early at the third intersection and never explained the reason, which aroused Lu Chen's curiosity; Lu Chen quietly followed and found out that Lan Xiaotang was taking care of patients with Alzheimer's disease Aunt Meng's grandmother Aunt Meng; Aunt Meng often talked about a young man named "Lao Lu" and promised to build her a climbing bicycle; Lu Chen searched for his father's belongings and found a design sketch, which was exactly the bicycle described by Aunt Meng; Lan Xiaotang was shocked and touched when he learned that Lu Chen's father was the Lao Lu mentioned by Aunt Meng; Lu Chen decided to use the parts and design drawings left by his father to restore the bicycle That bicycle; Aunt Meng's condition deteriorated and she urgently needed to be transferred to Beijing for treatment; Lan Xiaotang almost dropped out of school to raise money; Lu Chen signed up for the provincial youth cycling race without telling Lan Xiaotang and wanted to use the bonus to help her; The two had a quarrel due to a misunderstanding on the eve of the competition, and Lan Xiaotang said hurtful words in anger; Lu Chen was injured during the competition and still insisted on finishing the race, but failed to win in the end; Lan Xiaotang's grandmother's condition is stable After the decision was made, she chose to leave without saying goodbye, leaving only a letter explaining everything; Lu Chen was admitted to university to major in mechanical design and focused on bicycle research and development; four years later, he took a fully restored bicycle to an industry design exhibition, and reunited with Lan Xiaotang, who had become a rehabilitation doctor at the booth; the two pushed the bicycle through the fallen leaves street, and the detours they took in their youth finally merged into the same road.
