Watch VoirFilms. In the underground racing scene, emerging racer Xiao Le spirals into despair after an accident during a race with his brother, A Chieh. His life changes when he meets doctor Hui-Hui and becomes an ambulance driver, vowing to save people with speed. However, fate complicates things as San Pao and underground racing leader Brother Ben investigate, uncovering the unexpected truth about A Chieh.