Former characters: Gabriela Dawson, Erin Lindsay, Natalie Manning

Central chapter couple: Brettsey/Mansey

All units just arrived from a call.

Casey: Guys, good work today.

Herrmann: Thanks, Captain.

Boden: Very well, today.

Mills: For my first shift back, really impressive.

Sloan: A former someone is here.

Severide: Erin. It's been awhile.

Erin: Kelly, guys, I'm back and I'm here to stay.

Sloan: Good. Does anyone else know?

Erin: Hank does. Jay does not.

Sloan: Copy.

Boden: Everyone, we're done for the day.

At Casey's apartment

Casey: Yeah, it was amazing, interesting call.

Brett: Not gonna be easy at all. We got a problem. Hurricane Ex is coming.

Casey: For Severide, yes.

Brett: Not just for him. I talked to Dawson, she's in town for a week.

Casey: Gabby.

Brett: Yes.

Casey: I'm only for you.

Brett: Not true, before she left, Dr. Manning told me she had feelings for you.

Casey: Nat was in love with me?

Brett: Oh, yeah.

Casey: Doesn't matter.

Brett: Sloan spoke to me about it, it's actually a very big deal.

Casey: I'm going to someone else.

Brett: I love you.

Casey: Love you too.

Casey goes to Sloan.

Sloan: Brett told you about Manning, I take it?

Casey: Just did minutes ago.

Sloan: Now you know she had feelings for you.

Casey: Why was it a big deal?

Sloan: Nat got fired from Med and was leaving Chicago, she wanted you to go with her.

Casey: I would've said no.

Sloan: I wonder about Severide and Kidd. Lindsay's back in town, she could complicate it.

Casey: Same with Halstead and Upton.

Sloan: It is not easy at all.

Casey: Brett also told me that Gabby's gonna be in town for a week.

Sloan: Uh-oh, Gabby Dawson.

Casey: That's the one. She's a problem. I'm in love with someone else.

Sloan: Brett.

Casey: Yep.

Sloan: Someone could change that.

Casey: No one will change that.

Sloan: Anything could happen.

Casey: Better believe it.

Casey recieves a text and then a tear goes down his face.

Sloan: Breakup text?

Casey: Yep. Took her stuff out of my apartment.

Sloan: Wait for Gabby then.

Casey: Someone else will come along.

Sloan: Hopefully.

Later at Casey's apartment, just as both he and Sloan projected someone knocked on his door.

Casey: Better be good.

He sees a doctor who hasn't been in Chicago for a year.

Manning: Yeah, Matt. I'm back.

Casey: Doctor, Sloan and I were talking about you earlier.

Manning: Permission to come in?

Casey: Granted.

Manning: I heard about your breakup with Brett, I'm sorry.

Casey: I'm moving on immediately.

Manning: That's amazing. Exactly what you need.

Casey: Sloan told me about you and Owen leaving Chicago and your feelings.

Manning: I did have feelings for you. I still do.

Casey: Sloan told me that it's a big deal.

Manning: It was, I wanted you to come with me. I came to your apartment and I was nervous to tell you I was leaving.

Casey: The only reason why I got together with Brett was because you were with Crockett and I was jealous.

Manning: You loved me?

Casey: I did. The elevator moment was when I knew I loved you.

Manning: I would've been there for you. I would've been a better woman if I was with you.

Casey: There is one problem and it's only for a week.

Manning: What is it, Matt?

Casey: That's how long Gabby's gonna be in town.

Manning: Ah, your ex-wife.

Casey: She was not like Brett, or you.

Manning: Gabby was the one who you were in love with.

Casey: We're making her jealous.

Manning: I did just take a job at 51 as Sloan's police consultant as Lindsay's back at Intelligence.

Casey: Because both medic spots are full.

Manning: But, if one of the medics are off duty, I'll fill in.

Casey: Smart choice.

Manning: I have nowhere to stay, can I stay with you for awhile?

Casey: Absolutely, stay as long as you want.

The following morning at 51

Sloan: The doctor is in.

Boden: Dr. Manning, what brings you back to Chicago.

Manning: Here to stay, police consultant and fill-in paramedic.

Mills: One of two.

Manning: That's right, you're EMT certified.

Mills: You better believe it.

Sloan: You're gonna be pretty useful to me.

Casey: One more thing.

Manning: We're together now.

Severide: Only a matter of time.

Sloan: I see someone familiar, can't quite place it.

Casey walks out to see one Gabriela Dawson in front of the Squad rig.

Casey: Gabby, what brings you to town.

Gabby: Matt, there's this charity thing, I would really appreciate it if you were to come. You can even bring someone along.

Casey: I'll be there.

That night

Manning: This is very fancy.

Casey: What do you expect, it's a fancy place.

Gabby: Matt, thanks for coming and Dr. Manning, what a surprise.

Manning: I got in town last night, I stayed with him.

Gabby: Perfect.

That night, the trio had an incredible night and Gabby got a jealous look towards the new couple.

Manning will be in all other chapters forward while Lindsay will appear sporadically throughout the story.