A series of tragic events unfolds after Chang Chi-Mao's daughter goes missing as an infant. Chang becomes consumed by revenge against a powerful criminal organization suspected of kidnapping her. Along the way, he clings to the hope that his daughter may still be alive, determined to rescue her and break free from their dark fate.

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.