S city is lively and lonely, impetuous and lonely. All kinds of people stop here and leave. However, behind this glitz, there is a drug trafficking gang hidden. The presence of black police officers in the police force makes the already confusing case even more complicated...
As an undercover agent, how should Chen Yuan treat his suspicious friends?
Where should Lu Yao go, knowing that her elder brother is in deep trouble?
How do the two teams of undercovers fight openly and secretly?
How to choose between family affection and justice?