Mary Beth is the star witness in a trial that turns out not to be the slam dunk the prosecutors thought it was. Meanwhile, Chris and Mary Beth try to convince a rape witness to not back out of testifying.
A date rape investigation divides Chris, who feels the victim brought it on herself, and Mary Beth, who doesn't believe that philosophy. Chris feels honored for the girls to be let in on the male officers' practical jokes.
Isbecki becomes a hostage after Cagney and Lacey fail to back him up properly. Meanwhile, when Petrie accidentally shoots a black child, the department thinks the uproar will go away if the public sees Petrie is black, too.
A con man has to be let go because he had nothing on him when arrested, so Cagney and Lacey have to find a way to get him with the goods. Meanwhile, a fellow police academy graduate of Mary Beth's is a wife-beater.