Dexter arrives at a crime scene to find one of his victims he has disposed of has mysteriously returned to the scene of the kill. Dexter figures that it's the Ice Truck Killer, letting him know that he knows what Dexter is up to. The noose is tightened further, when LaGuerta finds a young Cuban boy hiding at the crime scene - there's no way he missed seeing Dexter capture the victim. Dexter has to figure out a plan to stay out of the crosshairs of his own Homicide Division while investigating his own crime. Meanwhile, Rita has to deal with her abusive ex-husband, Paul, when he's released from jail and wants to come to their daughter's birthday party.