When Terry’s favorite author, DC Parlov, returns to the precinct because his latest manuscript was stolen, Terry and Jake convince Rosa to go undercover with them at a fantasy fiction convention to find the culprit. As drama ensues between Parlov and another writer, Terry admits that he’s been writing a book of his own. Back at the precinct, Holt, Amy and Charles take a forensics course, but Charles’ big mouth gets him in trouble.