Who Are You?

"Can I get the guy that you are holding?" Jack looked towards the stunned Olivia as he asked.

Olivia finally came back to her senses. She stared at Jack for a while before she spoke. "Thank you for saving me." As she said that, she looked at the dead bodies of her colleagues and couldn't help but feel remorseful.

She wasn't an idiot. She knew that if Jack had not appeared, with more than three snipers present, there was no way that she was going to escape from here alive.

Furthermore, he was the one that had given her the body strengthening solution that had boosted her abilities by more than a single fold. It was only due to this that she had managed to deal with the six that had been attacking them from behind.

But then, there was something that she couldn't understand. What was the relationship between Jack and Nathan?