Start in Elena's POV before she gets recruited
It was a good day, Elena thought. A priced jewel such as the one she's stolen would bring her millions in the black market. All it took was weeks of scouting and preparation. But that was fine. Elena was a patient thief.
She rappeled down to her apartment window in the rainy night. The police hadn't yet realised the jewel in the vault is a fake. She'd give it a day before they do. And when they do, she'll be far and far away from the lawful clutches.
She opened the window and stepped in, her suit wet and drenched. She couldn't bare to look at the picture frame on the shelf. She couldn't bare look at him now. She was way too sober for that.
The jewel is safe. Hidden in a hole behind the painting. Now, she can relax. She falls on her couch with a bottle of beer, one of the good ones and starts relaxing.
She hears a knock on her door. Goddamnit, she thinks.