When a retired DEA agent is shot in the street the team investigate. Later another man is killed in the same fashion. They see if the two men have any link, they discover both men are going to testify against a gang of drug dealers. They are told who's most likely the one who gave the order. They try to find a away to get to the man. They learn of a girl who works for him, they learn she buys pain killers, they arrest her and tell her she can either help them or go to jail.she agrees to help. Tiffany is paired with Nina and she doesn't exactly give her a warm shoulder. Ninais worried about the girl but Tiff says they need her. When she gets them the evidence they need they go to arrest the man but the man is dead shot by the same gun that killed the agent and the witness. When they do some more digging they learn that the girl's boyfriend might be involved so they want her to help them. Nina reminds them after helping them they told her she's done. But Tiff says they need her help.
