Deb faces her first day as the homicide squad's Lieutenant. She isn't sure she's made the right decision given that she not used to the administrative side of the job and the fact that she is also supervising her now ex-boyfriend Quinn. She also has to deal with Captain LaGuerta who seems to want to do both her new and her old job. The police find another body on the shore. The dead woman may have been a prostitute but it's her missing tooth that sends Dexter to an old scrap book. He finds a newspaper clipping for a serial killer from Oregon who the press labeled the Tooth Fairy after the fact that he kept a tooth from each of his victims. Masuka shows intern Ryan Chambers some evidence from the Ice Truck Killer case. He also manages to ask her out on a date. Gellar and Marshal meanwhile have taken a jogger prisoner. Marshall tells the man he will have to repent for his sins.