In the dead of night

What happened? She must've blacked out because the next time she opened her eyes, she was here. And then she'd heard footsteps and the door closed as she was locked in. The room was dark as there were no windows. Another girl, skinny as a skeleton, was there.  How long had she been here? She obviously hadn't eaten for a while. Her rasping breaths told of her dehydration. She told her she'd get them out of this. There was a rusty nail on the floor, she picked it up and rolled it in her fingers. With the nail in hand, she waddled over to the wall and felt for the groove she'd already made.

The door opened and what looked like a fairy  in a green dress layed down a tray. On the tray was a cup of water and two slices of bread. She drank half of the water and ate one slice of bread. She held the cup to skin-and-bones's lips for her to drink. She put down the cup and tore a small corner off the slice of bread and she managed the chew and swallow the small morsel. Then she went back to the groove. It would probably take years, at this rate. She scratched and scratched in desperation. It wasn't going to work. She was amused when a tiny part of the plaster crumbled away. Tommorow she would give it another try. The next day was much the same. The “fairy” in the green dress brought them a small portion of sustainance. She fed skin-and-bones who ate both pieces of bread. As darkness came she worked away at the brick, she'd made deep grooves in two sides now. She listened to skin-and-bones thank her for feeding her. She'd thought she was an angel. And that's what she called her, because neither of the girls could recall their own names.

That night skin-and-bones was the one sratching at the groove and feeling for any give. The brick was giving. Skin-and-bones smiled and wiggled the brick to loosen it up. Angel came to see what was happening, she picked up the nail and started scratching. Finally the brick fell. They pushed and pulled at the remaining bricks until they fell so that they could see the moon. They clasped hands and ran...