"Undercover 2" is the sequel to the 2011 TV series "Undercover", and is one of the six major TV series recommended by TVB at the 16th Hong Kong International Film & TV Show. Law Lik-Ah (Kevin Cheng) was imprisoned for breaking the law for Wong Sze-Ku (Myolie Wu). Sze-Ku was inspired by Law Lik-Ah to give up fame and fortune and shoulder the mission of fighting for legal justice for the disadvantaged community. Sze-Ku sought justice for the neighbors and did not hesitate to lower herself and run to the streets to fight, thus winning the title of "Female Law Bully". After being released from prison, Law Lik-Ah happily became a lawyer and became the man behind Sze-Ku. The two of them joined forces to become the "Condor Heroes" of Sham Shui Po and continued to plead for the people. However, Law Lik-Ah and Sze-Ku often had completely different attitudes and methods of dealing with things, which caused a lot of friction. Law Lik-Ah's ex-wife King Ling-Lee (Christine Kuo) suddenly returned from the United States, putting the relationship between Law Lik-Ah and Sze-Ku to the test. At this time, their handling of a building collapse accident case caused dissatisfaction among real estate tycoons, which led to Lik-ya's death. Best friends Ting Ka-fu (Sam Lee) and Michael Mi (Lam Chi-sun), as well as a new district clerk Leung Pao-sing (Cao Wing-lim) were also implicated. In the end, can they work together to uphold justice through the law and seek justice for the disadvantaged citizens?