Lu Tian and Xu Ming didn't know each other since they were in the first year of high school, but they were together in the second year of high school. Lu Tian passed the college entrance examination to become an anti-narcotics police officer, and Xu Ming passed the examination to become a forensic doctor. Lu Tian was discovered during an undercover mission and died after being tortured for 40 days. After Xu Ming learned about Lu Tian's death, he began to learn what anti-drug police should do, and restarted Lu Tian's police siren three years later. He avenged Lu Tian with his own hands, and Xu Ming committed suicide after avenging Lu Tian.
Intention: None