One of Vanessa Cavanaugh's students, Bill Wallace, commits what she taught to be a perfect murder. No evidence, no witnesses. After the murderer confesses his crime to Page and Debreno, he recants and starts to play with Mannion, who can't charge him since the confession wasn't recorded. Mannion is out to get him for the murder of the father of three children. Page and Debreno find evidence linking the suspect to the murder scene. Meanwhile, Parras works on a Jane Doe case and discovers the victim's estranged mother; and Kendall finds it difficult to end her relationship with a married man.

While in L.A., Mannion unexpectedly meets up with Vanessa Cavanaugh and offers her a ride. Unfortunately, the pair find themselves stranded in a deserted part of town after their rental gets carjacked. Back in Washington, Deputy Mayor Lockhart asks Debreno to help her find a blackmailer who has a scandalous videotape that could destroy her career; Kendall is threatened by her ex-boyfriend; and the mayor offers Ella a job.