When three women are killed by someone who writes "please" with their lipstick after killing them. Two female cops are sent to live in a singles apartment and Webster and Gillis are sent to keep an eye on them.
When the guys respond to an alarm, they arrive to find two men. When they split to get each of them. Mike ends up catching the one he was pursuing while the one Terry and Willy were chasing gets away. When the man is charged and the whole case hinges on Mike's testimony, the other man who happens to be his brother decides to lash out at Mike to get him to change his testimony by terrorizing Jill.