The Unit investigates the death of a prep school student who was planning to bomb his school. They track down his partner and eventually uncover that the boys were molested by their swim coach and only planned to get back at him by blowing up his car. It is found that the dead student was in fact murdered by a man hired by the swim coach to cover up his crimes. The case gets personal for Halstead and he bonds with the young victim. Meanwhile, Olinsky's wife throws him out over his refusal to abandon his new daughter, leading him to move in with Ruzek, interrupting a date with Burgess. Atwater tries to get in good with a legendary police captain from another district.
Intelligence goes over the case more and it is revealed that the Jeff that Ethan and Colin met was an imposter. It also turns out Collin did not commit suicide but was murdered due to the fact it wasn't enough gun residue on his hands. Sanders was not the culprit because of an alibi. Mouse brings up surveillance cameras that reveals that Colin met up with another young man who is said to be Jeff. Intelligence goes over more evidence that reveal the Sanders liquidating money from his kid's college fund and that he volunteered at the Juvenile hall center, so he most likely paid a juvenile delinquent to meet up with the boys and silence them. They soon identify the person as Jesse a delinquent who was just released.
With Sanders in custody, Jay wants to interrogate and punish him but Voight says he is too close and driven by anger. He goes to speak with Sanders bluffing that Jessie is telling them everything and how its over. After Voight leaves, Jay watches Sanders sit for a while until he shouts Colin was not meant to die. Voight comes back, as Sanders confesses how Jessie was only supposed to intimidate the boys into silence, not kill them. He says Jessie is to blame for the murder, while Voight listens more. Jay and Lindsay are shocked by the confession.
In a flashback to 1980's Mexico, two young boys fight over a toy while their uncle, Hector Salamanca, disparages the "chicken man" during a phone call. When Hector finishes the call, one of the boys, Leonel, complains that his brother Marco broke the toy. When Leonel says that he wishes his brother dead, Hector dunks Marco's head in a tub of icy water. When Leonel hits Hector in the face, he finally releases Marco, having caught his lesson that "family is all". In the present, the now-grown Cousins light candles at a makeshift Santa Muerte shrine. In the center, they place a photo of Hank. 781b155fdc