The rookies are involved in a case of mistaken identity when they charge the wrong man with the murder of a policeman.

Jill is working in a womens prison, fighting an outbreak of diphtheria. In order to protest for better food and working conditions, inmates take Jill Danko and Dr. Malcolm hostage.

Young crooks Pat Stevens and Glen Barton rob ticket agent Brewster and shoot rookie Chris. The scene is witnessed by mailman Charlie Brooks, who is adamant about not getting involved. Eventually his wife, Nadine, and daughter, Stacy, encourage him to cooperate with the rookies, and finally, the criminals are apprehended.

A rookie accidentally overpowers a professional assassin and is named ""hero"". The assassin vows to kill the rookie and escapes with Jill as a hostage, offering to exchange her for the rookie.

Forest, a tough career cop, takes $10,000 from the scene of a robbery after his partner is killed by the robbers. Lt. Ryker puts an undercover investigator on the case to retrieve the money.