A traffic accident changed their lives forever. In capturing wanted criminal Zhang Yidong, Sergeant Tong Fei (Nicholas Tse) was involved in a gunfight and car accident that put the criminal in a coma. But in the process he also crippled a fellow officer, and mistakenly shot dead the elder daughter of public prosecutor and single mother Gao Min (Zhang Jingchu). Unable to handle the guilt, Tong Fei succumbs to a fog of pain. Gao Min, meanwhile, pours all her love and attention to her younger daughter Ling. Three months later, the criminal Cheung Yat-tung awakens from his coma. Gao Min, who had been working hard on bringing him to justice, insists he stand trial immediately.