The Extractor

Annaliea, a girl with seemingly no past, is dropped into her new life without a single memory only a title of Valuable. Shortly following her, a young boy named James, with the title Worthless, will stop at nothing to figure out how he knows this girl and why he can't remember his favorite color.
Hundreds of years into the future, amnesia is very common amongst young, injured teens. Teens with invaluable memories that have immense power. After harnessing these memories, a body is left behind as either a Worthless, with no reason to keep around, or a Valuable, with extreme skills of their own. But sometimes, a Worthless, could be worth more than their name cares to let on.
People want them. Memories and all. And they will stop at nothing to attain them.
Somehow, Worthless and Valuable alike, these beings end up at a mysterious place called the Castle where their life beyond memory can begin.