Malloy is given a tip that a young man he coaches is using heroin again. Malloy and the boy's parole officer work together to track down what is going on. Reed and Malloy respond to a hit and run where a small boy is hit and hurt severely. The boy thinks Reed is his father who was killed in Vietnam. A man blows a stop sign resulting in a traffic stop. He is given a ticket but his passenger is taken in for selling drugs. In reality he is an undercover officer trying to make a buy from the driver. Malloy is called by the parole officer to help take in the young man for using again. They learn he had bought some heroin but did not use it. However, they find his younger brother had.

Adam-12 arrives at a scene in Chinatown where a young man was beaten. He is an undercover officer working on Chinese gang problems. A young lady briefly appears but runs off before talking. A report is taken at a department store where a woman's purse was stolen while she was in a bathroom stall. They accompany her to her house where they catch the thief, a man. Reed is asked to report to the hospital where they believe the young woman has reappeared but her uncle refuses to let her talk. The next day they are asked to help bust counterfeiters where the same burglar from the day before had stolen counterfeit money and then caught passing it. They spot a man driving erratically thinking he is drunk. However, A lit joint in his pocket gives him away when it burns him. Reed receives a call from the young woman reporting an attack by the gang on the older Chinese organization. They and the gang squads arrive as the shooting starts.