Scene opens in the morning. Beckett sitting at a table in the lounge, looking over case files. Castle is in the kitchen, making coffee. Castle walks over to the lounge and hands a cup of coffee to Beckett.

Castle:

I don't understand why we don't just go after him.

Beckett:

Because everything we have is circumstantial. Anderson couldn't name a name, and no one at Christina's work suspected she was having an affair. We don't even know if her lover had anything to with her murder. (She throws up her hands in frustration.) For all we know, her husband found out about the affair and killed her. (She looks up.) Unless…

Castle blinks.

Castle:

Unless what?

Beckett:

You remember what Anderson said: Christina was leaving town. Now she didn't tell anyone, but she must have had something – a plane ticket, a packed suitcase, maybe even just a call to a travel agency – something so that she'd be prepared when she left.

Castle:

But we didn't find anything like that. And you think someone – her family, her coworkers – someone would have noticed if she had this lying around.

Beckett:

But what if she wasn't going alone?

Castle:

Then whoever was going with her could hold onto everything. He's quiet enough. No one would ever know.

Beckett:

There's just one problem. Why kill her? If they were planning on running away together, what's his motive?

Castle:

Maybe something happened. Maybe she changed her mind.

Beckett's eyes widen in understanding. Beckett turns to Castle.

Beckett:

Maybe Christina broke off the affair.

Camera zooms in on Castle, who smiles slyly.

Castle:

Only one way to find out.

Scene ends.

Scene opens with the door to the office Castle and Beckett started the episode in. There is a jimmying of the lock and it opens. Castle and Beckett sneak in and close the door quietly behind them, locking it. The lights are off both outside and inside the room, so it is clearly after hours. Castle and Beckett split up and begin rummaging through the papers on the desk.

Beckett:

He'd want to keep it hidden. Safe. Check the bottom of the drawers.

Castle:

On it.

Castle opens up the drawers and sifts through the papers. Beckett checks a bookcase in the corner, looking for loose papers in the books.

Castle:

Hey Beckett, I found something.

Beckett:

The tickets?

Castle shakes his head.

Beckett:

Come on, Castle, we don't have much time. Stay focused.

Castle:

Just hear me out. (He holds out the sheet of paper.) This is a list of people involved on the New York vs. Anderson case. Notice anything?

Beckett takes the sheet from him and looks at it.

Beckett:

He was assisting her on this case.

Castle:

And they're the only two from this firm.

Beckett:

So he would have known that she dropped the case.

Castle:

Funny how he didn't mention that when we talked to him.

Beckett smiles.

Castle:

And another thing. (He picks up two plane tickets from the same drawer.) Looks like he'd been planning on going somewhere.

Beckett takes the plane tickets from Castle.

Beckett:

Mexico. The day before Christina's death.

Castle smiles.

Castle:

Wonder why they never went.

Beckett smiles.

Beckett:

This is great. We got him now.

There is the sound of security entering the building. Beckett and Castle cringe when they realize that they're stuck. Following the scene at the beginning, Beckett turns to Castle.

Beckett (whispering):

I hate you.

Castle:

No you don't.

Beckett smiles.

Beckett:

All right, but if we get caught, I swear I'll kill you.

Castle:

I'll make apology pancakes for you in the morning. (He stops and listens.) I think the coast is clear.

The two of them peek out the door and seeing the coast is clear, tiptoe towards the exit. They have just reached the door when flashlights shine on them.

Police:

FREEZE! NYPD!

Beckett and Castle cringe. They hold up their hands and turn around. One of the police officers lowers the flashlight in surprise.

Police officer:

Beckett?

Beckett blinks, trying to see past the bright light. She leans forward.

Beckett:

Esposito?

Scene cuts to outside the firm, where one police car is waiting. Castle and Beckett are waiting outside the firm for Esposito. Esposito comes by. Castle seems a bit confused about the situation but doesn't want to rock the boat. For a moment, they say nothing. Beckett inhales.

Beckett (to Esposito):

I'm sorry. For what happened.

Esposito shrugs.

Esposito:

It's not your fault. I said I'd have your back, no matter what happens.

Beckett:

Yeah, but Gates busted you down to what? Security guard? Break-ins? (She frowns.) It's got to be hell coming from homicide.

Esposito shrugs.

Esposito:

It's no big deal. Besides, you gotta do something to pay the bills. (He pauses, then looks from Castle to Beckett.) So what are you two doing breaking into a law firm anyway?

Castle:

We're looking into a murder.

Esposito chuckles.

Esposito:

Still playing Nancy Drew, huh? (Esposito bumps Beckett's shoulder in a friendly manner.) I thought you were done.

Beckett:

This one's different.

Esposito shrugs.

Esposito:

All right. Tell me if you need anything. (pauses) Although, you were caught breaking into a private building, so I still have to report you.

Beckett exhales, trying to smile.

Beckett:

I understand, Officer.

Esposito smiles. He hits Beckett playfully on the arm.

Esposito:

It's good to see you, Beckett. (He turns to Castle.) You too, Bro.

Esposito's partner calls out to him from the police car.

Esposito's partner:

Hey, Espo! Got a call from your old boss.

Esposito blinks in surprise.

Esposito:

Gates? What she want with me?

Esposito's partner shakes his head.

Esposito's partner:

Not you. The two we found breaking in – those friends of yours.

Esposito turns to Beckett and Castle, who cringe.

Castle:

She knows, doesn't she?

Esposito nods.

Esposito:

Yeah. Yeah, she does. (pause) Good luck…you're gonna need it.

Scene ends.