Yi Guangming, a blindman, got acquainted with Mr. Ma, a marathon master who always goes to the massage parlor Yi works in.
Since then, running marathon has become part of Yi's life. Blind people need accompany of professional runners to run the marathon.
Ma is both coach and accompany runner, leading Yi out of the small massage parlor. Yi runs to the playground, runs on the road, runs on marathon field, and finally marches toward Boston Marathon.