The surveillance tape from the latest robbery in a string of break-ins leads Shawn to believe that women are the culprits. He further narrows the suspects down to a local roller derby team and suggests that in order to pinpoint the people responsible, Juliet needs to go undercover as a member of their team. Though it's technically her investigation, Shawn can't help getting involved in the case. And with Gus busy studying for an important pharmaceutical rep exam, Shawn uses the opportunity to try getting closer to Juliet.