Police officer Leung Siu Tong (played by Nicholas Tse), nicknamed "Laughing Brother", successfully completed his undercover mission and was given an i[Expand All]
Police officer Leung Siu Tong (played by Nicholas Tse), nicknamed "Laughing Brother", successfully completed his undercover mission and was given an important position at CIB. But the general manager Harry (played by Liu Songren) and his superior Jodie (played by Fala Chan) have doubts about the death of his manipulator. During the investigation, they discover that there is something else going on. After the recruitment of new members at CIB, Laughing and Jodie became a pair of bickering rivals due to their different training philosophies. They had their share of victories and defeats and refused to give in to each other. In addition to taking care of his wife who is suffering from cancer, Harry also has to deal with his ex-girlfriend Yuan Junlan, who was just released from prison after serving twenty years. Fortunately, his son Aidon is an outstanding dancer and always ready to help others, which makes him feel at ease. In order to fight against Yixing, Laughing cultivated the lame CoMichael (played by Wong Chong Wa) as an informant. The latter gradually gained important positions in the conflict between the gang leader Ma La Jiang and Wei Li, and broke away from Laughing's control. He reignited his love for his former lawyer girlfriend Yao Keke (played by Cecilia Cheung) and strived to rise to power. With the return of Mo Yilei, the gang leader, a battle between police and gangsters as undercover agents and a struggle between the human nature of the black and white have intensified...[Collapse]