After three woman are murdered, the Police Squad takes action. In order to solve the mysterious murders and prevent future ones, the Squad welcomes two women officers to the force, Dawson and Conway. A plan is created which places Dawson and Conway in an apartment complex together, with Webster and Gillis across the hall.

Jill Danko is seriously wounded by a seemingly demented gunman while dining with her husband Mike. Later, they find out that the gunman is unable to be prosecuted in court, because he is suffering from a brain tumor which appears to be the cause of his action. The rookies take it upon themselves to prove the man is dangerous and can place society in jeopardy.