Seventeen-year-old rural boy Agui (Cui Lin) found a job as a courier in Beijing. He was promised that when he earned 600 yuan, he could own a silver gear-shift off-road vehicle that the company temporarily lent him. He worked very hard every day, but just when his dream was about to come true, the bicycle was lost, and Agui fell into despair. Xiaojian (Li Bin) is a Beijing boy of the same age as Agui, but because of his family's poverty, he often feels inferior while maintaining his pride. After his father repeatedly broke his promise to give him a bicycle, Xiaojian stole money from home to buy a second-hand car in order to earn face in front of his friends and pick up a girl (Gao Yuanyuan), but he didn't expect that this car was lost by Agui. After Agui found out that the bicycle he relied on for survival was "stolen" by Xiaojian, he began to desperately get it back at all costs. The two teenagers fought to protect their simple dreams.