Voight is questioned by the higher power of the Chicago Police Department and asked if he was there at the time of Jin's murder.
Voight isn't too pleased about what's happening, and as her heads back to the house, he gets questioned by his unit. He does blow up a bit from all the questions and asks for any updates.
Later, Antonio gets an inside source that there is going to be an exchange of a piece of evidence for money. When the gang goes undercover, Ruzek enters as the insider and the others follow; the unit gets ambushed, and a shootout begins.
As the squad returns to the house, Al informs the group that the guy involved in the exchange was the man who had killed a girl years ago, and that the evidence that was to hold him had disappeared, and without that evidence, the guy is a free man. And it upsets Al.
Meanwhile, Halstead gets a package sent to him six weeks ago and finds out it came from Jin. It was a hard drive that had information. He talked to Erin about it and found out that it had some intelligence of Commander Perry, and it turns out that Jin wasn't going beyond Voight's back after all.
Deciding to give or not to give to Voight, he does, and Voight takes it and tries to make a deal with Perry, but Perry turns things around and threatens Voight if he turns him in that, he'll turn him, tone beyond his squad's back.
We see that Burgess is getting a new partner; after we saw last time, her partner was a big someone with experience but not in tip-top shape. She's introduced to Roman, who doesn't quite like to work with female partners because of his history of falling in love with one.
As Antonio speaks to his source again, they got one of the guys who's part of the exchange for over $200,000. And so they set up a sting, with only one member knowing. As the squad awaits the arrival of the guy Al wants to put back in jail, they set up and see them coming. As the group gave the others the money and then gave them the evidence, they started shooting.
The squad goes in, and the mod guy and his gang leave, riding off. They're stopped, and the guy's brother steps out. As Halstead and Erin come out, the brother grabs his gun, and Halstead shoots down the brother, and he's dead.
Later, Voight gets a visitor, who turns out to be Jin's mother, who wants to tell him that he always wanted to be a police officer and that at the academy, he was mistreated. Adding that, since he joined Voight's team, he felt more of a team than before. Voight is later called back by the head CPD people and asks for his shield and gun, but he then wants to talk to the chief and discuss what Jin is doing.
Later on, some of the gang are at Molly's talking to the new member of Firehouse 51, the one who replaced the late Leslie Shay. He gets an inside source saying that there's a hit on Halstead after killing the brother of the guys they were after. Al gets to Molly's and tells Halstead about the bounty on him.
As the episode ends, Voight is seen in the storage room, moving a shelf where a vault is shown, opening it up, putting the hard drive in there, and grabbing about $10,000 for Jin's father to clear his gambling debt.
The season of Chicago PD has started with a bang. It seems that the squad is still intact after Jin passing, not like what happened over on Chicago Fire. It seems Voight does have some heart in him, but also that he still isn't telling the truth about him being this dirty cop to get the bad gangs in jail.
Burgess and Ruzek are more robust in relationship. She still hopes that she will make the intelligence squad.
You can catch new episodes of "Chicago PD" on Wednesday nights at 10/9c on NBC