Seven years ago, the chief of the police academy, Jiang Lin, infiltrated the transnational crime group "White Tower" under the code name H-07. Since then, his identity has been erased, and his life and death are unknown. Seven years later, criminal investigation captain Zhou Yanchuan confronted him at gunpoint at Pier 17. The bullet missed by three centimeters, allowing Zhou Yanchuan to recognize that this dangerous man being hunted by the whole city was still the same classmate who refused to cross the bottom line. One is searching for the truth behind his father's death within a criminal group, and the other is guarding the evidence between discipline and personal affairs. They must hide from the drug lords, uncover the mole, and close the net before the undercover evidence is destroyed, and Jiang Lin's name, which has been lost for seven years, can be recognized again.
