A/N: Yep, prologue, nothing much to see here.

She and the two identical copies of herself held Booker by his shoulders, but a voice in her head whispered that she could not do it; and she fully believed that voice. What kind of daughter would drown their own father? Even if it meant saving the world from the horror that was Comstock, she just could not get herself to do it.

Booker's face contorted from the understanding expression to a confused one. Such a face looked funny on a man like Booker, Elizabeth would have laughed if she could, but all she could do was smile at him instead.

"Elizabeth? What're you doing?"

She suddenly let go of his shoulders and kept smiling at him. Her doppelgangers disappeared into the air, one by one, until only she was left. Booker kept that expression he had been bearing and wondered if his Elizabeth would disappear as well, but she didn't.

"I'm not Elizabeth. You should call me Anna now… daddy."

She embraced her father who seemed even more bewildered than previously, but he still wrapped his big arms around his daughter and rested his chin on the top of her hair while she buried her face in his shirt. He could hear her sob quietly and the tears wetting his shirt.

"What's wrong?"

"I can't do it, I just can't. What kind of daughter would I be if I killed you?"

"You would do me and yourself a favour."

"I'm not even completely sure what would happen to you and me if I did it. I… I just need to recollect my thoughts on this."

He brought her a tiny bit closer to himself, squeezing her slightly by accident.

"Ow."

"What?"

"You're squeezing me."

"Oh, sorry."

Booker let go of her and stared into the sea-blue orbs of hers.

"Take all the time you need."

"Thank you."

Booker walked over to a rock that was just above the water and sat on it. He took a cigarette out of vest's pocket and lit it with a lighter he had in his trousers' pocket. He sat there and observed Elizabeth who was staring down into the murky water with her hand rubbing her chin lightly. After a while, the smoke reached her nostrils and she looked up at Booker.

"Those aren't good for you."

"Who cares?"

"I'm your daughter, I do care."

"Touché."

"French? Where did that come from?"

"Who knows."

She smiled warmly at him, he smiled back at her. His eyes didn't move whilst he took his cigarette and threw it in the river. She would probably continuously bother him with it if he continued, and it was a bad habit he wanted to put an end to. Elizabeth went back to staring in the river before slowing opening her mouth to speak.

"Hey…"

"What?"

"We have all the time in the world. We could explore the different universes while thinking about this whole Comstock ordeal."

"If that's what you want."

Elizabeth began walking towards the shed and Booker rose up from the rock he was sitting on and followed her. When he opened the door he found himself in the familiar "shore" as Elizabeth called it. The lighthouses had taken the form of the first lighthouse Booker had seen when they had emerged from that peculiar underwater city. Although this time, it was daylight and the sun shone brightly above them, and he wondered if the sun was another lighthouse.

"So, what universe first?"

"I don't know. Let's just walk around and choose one randomly?"

And so they walked for what seemed like hours before Booker finally stopped at one of the lighthouses.

"I like this one."

"But they're all identical and only I can see what's behind them without actually going in there. How can like that one when it looks the same?"

"I said that I like this one, so let's take this one."

"Whatever suits you, father" she said with a fake sweet voice.