A guy comes up to a bunch of gang members. He shows his badge and challenges them.  The gang members threaten him and he goes. They come after him and beat him up.

Frank comes to the hospital. Sid tells him the guy is not expected to live. The officer's wife is at the bedside. She's barely holding up and wants Frank to find the person who did it. She wants to speak at a press conference. She feels that Frank is no hard enough on cop-haters.

Meanwhile, Eddie and her partner have been called to the site of a used bookstore that has been ransacked. The burglars raided the rare book section. A bunch of first editions worth over 6 figures have been stolen. The bookstore might not be able to stay open.

Erin runs into Anthony and a woman at a coffee shop. Anthony doesn't seem to want Erin there. Anthony makes an excuse to go to the office.

Danny and Baez talk to a CI who insists he has no info. They find some drugs. Now Bugs wants to talk but Danny arrests him. Bugs says he heard about the cop who got his ass whupped. He says the guy was dirty.

Henry and Jamie attend a memorial for a chief of staff that has passed away. Harold's granddaughter comes up to them. She loved hearing Harold's stories about Henry. Harold was in such good health. It turns out Harold didn't have a heart attack. He fell and hit his head. Henry whispers to Jamie that he doesn't believe that's what happened to his friend.

Danny goes to see Frank. He can't talk to Sid about this because Sid won't listen about corrupt cops. Allegeldy O'Neill is in business with the Dead Twins. Frank says things have not added up around O'Neill. There was no reason for him to be in that area that night.

Meanwhile Eddie's new partner is an expert on literature. He read to escape where he grew up. Eddie says they've done their part. Her partner has managed to get the case for them anyway.

Things are awkward as Erin tries to return a file. She asks about Anthony's friend. He is giving her one word answers and insists he's busy, Erin claims to be concerned. Anthony has been taken advantage of before. Anthony says not this time.

Jamie comes over and Henry wants him to help investigate Harold's murder. He's sure Harold didn't trip and fall. Jamie thinks Henry is overreacting until he learns that a mobster Harold put away is out on parole.

Danny and Baez try to force Bugs to tell them the name of their source. Bugs doesn't want to. Finally he says Marcus, his brother.

Erin has gotten a background report on Anthony's friend. No criminal history but her old man is serving life and is a Russian mobster.

Danny and Baez take Bugs to see Marcus.  Marcus is not cooperative until Danny suggests he stand outside so the whole neighborhood sees.

Marcus claims not to know anything and that he got out of gang life years ago. He finally admits that he overheard the cop was working with the Dead Twins. A guy named T just got out of jail, that's all he got.

Lily doesn't want to give patrol cops instead of detectives any info.  She eventually does. One book, Watership Down, didn't fit with the others, and it caused a feud with a private collector.

Jamie goes to see Harold's granddaughter. She tells him that Harold and Chris Kelly used to write each other letters. What is this about?

Garrett complains about Sarah O'Neill. Sid doesn't see what the big deal is. Garrett realizes Frank is not telling him something.

Bugs tells Danny and Baez where T is, but it's a set-up -- a bunch of gang members shoot at Danny and Baez.

Danny confronts Bug, who insists he didn't know there was going to be an ambush.

Frank watches while O'Neill's son visits his father.

Jamie goes to see Chris Kelly. He questions Kelly about having coffee an hour before Harold died. Kelly says that Harold is the reason he's here at all. He had to write letters to the people he hurt when he was in jail. The victim's family wouldn't take his letters but Harold did. He was a kid working for the mob and went too far and Harold gave him a second chance. He bought him coffee to thank him.  He went to the laundromat after.

Frank talks to O'Neill. O'Neill says he catches people by being in the right place at the right time. Frank says O'Neill has only picked up rivals of the Dead Twins. Why was O'Neill in the neighborhood that night? O'Neill claims he was doing overtime. Frank knows that's a lie. O'Neill says he is using the Twins to get their rivals off the street. Frank asks him did he take money from the Twins? O'Neill did but knew it was a mistake. That's why he was there, to return the cash. Frank suggests that's why they beat him up.O'Neill is sorry he let Frank down. Frank says that's not who is important. O'Neill thinks he paid for his sins with these injuries. Frank doesn't have to say anything, right?

Anthony is leaving. He is dressed up for dinner. Erin goes to follow him.

At the bar, Eddie finds out their suspect was at a book fair in Florida. So now they have no leads. Maybe they should send what they have to Major Cases. Her partner says that Charlie was left out of the inheritance, so maybe he is involved. Eddie doesn't think it's Charlie. Insurance fraud would be a lot of jail time. She and her partner decide to talk to the bookstore owners.

Erin spies on Anthony and his friend. Anthony hugs the woman goodbye and then goes to confront Erin. Did she follow him? She admits she did. She wanted him to be okay. Yolina has mob ties. Anthony knew this already. He was the one who put her dad in jail. He always checked up on her to make sure she was okay. He knows it's weird. Also it's not Erin's business.

Danny and Baez confront Marcus who claims he had no choice. He couldn't let the Twins hurt his kids. Bugs goes to see if there are other people in the bar and gets shot.

At dinner Eddie reveals that she and Jamie are in the wine of the month club. Erin doesn't get what the big deal is. Sean takes advantage of this to drink some wine. Erin and Danny insist that expensive wine is a scam. Eddie thinks they are all to cynical.

Erin tries to apologize but Anthony wants space from her. Erin walks off upset.

Eddie and her partner come to talk to the bookstore people.  They talk to them a bout insurance fraud and question them. They try to arrest Charlie and one of the sister's confesses.

Baker offers to sit in with Sarah O'Neill. Frank declines her offer.

Sarah comes in and refuses to sit down. She wants to know whether it was Frank's idea for Abigail to reach out. She's upset that Frank has not made a statement about her husband being a hero. Frank asks her if she really thinks he doesn't care.  He says he has handled this the best way he knew how. Sarah doesn't buy it. Frank suggests she ask her husband and then if she still has questions his door is open.

Jamie comes to see Henry. Chris Kelly's alibi checked out. Henry doesn't believe it. Jamie says Harold wasn't murdered. Henry says this makes no sense. Jamie tells him sometimes these things just happen. Henry says it's not right. Harold was his protege. Jamie knows it's not fair.  He offers a toast to Harold.