-Brandi has a new job selling cars at Peter's dealership. When six cars are stolen off the lot, Brandi's past makes her a suspect.
-Mary immediately suspects Brandi too. Despite her new job and engagement to Peter, Mary doesn't believe that Brandi is capable of change.
-Peter stands by Brandi even when his parents want her to sign a prenup.
-Mary and Marshall contact a protected Witsec witness and former car thief to help figure out who stole the cars. He realizes that the real thieves took Brandi's password from her desk.
-Mary, Marshall, and Marshall's new detective girlfriend Abigail track the car thieves to a salt mine where a shootout and chase ensue. Abigail is wounded and the thieves are caught.
-Stan hires a new Deputy named Delia whose sunshiny disposition annoys Mary.
-Peter apologizes to his parents per Brandi's request and she agrees to sign the prenup despite Peter's protests.