College student Zheng Yi dreams of becoming a stunt cycling master and winning the championship. To save up for a racing bike, he works part-time delivering food, riding his bicycle through the city every day, accompanied by his childhood companion, the falcon "Sui Feng." Zheng Yi's grandfather was a comrade-in-arms of Lei Feng, and influenced by his grandfather since childhood, Zheng Yi is a warm-hearted young man who never hesitates to lend a helping hand whenever he encounters someone in need. Zheng Yi bravely intervenes in a crisis, chasing the gutter oil monster through crowded streets on his bike, ultimately risking his life to rescue a baby in danger. His deeds are reported by the media, making him an overnight sensation. Because he wears his grandfather's Lei Feng hat, he is hailed as "Lei Feng Xia" (Lei Feng Hero). Lei Feng Xia continues to roam the city, helping others wherever he goes, quickly becoming a social focus. However, Zheng Yi keeps his identity a secret. As time goes on, sparks of romance begin to fly between Zheng Yi and Chen Yang, who admires Lei Feng Xia...