A call to a night club finds a singer, Kathy, strung out on drugs causing a disturbance. She finds security with Reed who rides with her to the hospital. She tells him someone is trying to kill her and giving her drugs. Narcotics believes she can provide a lead to new drugs and ask Reed to go undercover with Kathy as a soldier AWOL with a big cache of heroin to sell. He agrees and although he makes a deal, the girl burns him under pressure. The narcotics squad lose Reed but Malloy arrives as the dealers are trying to kill Reed and Kathy.

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.