Uncertain. Eighteen-year-old Emma Harper knows she has a problem. Now she has to learn to live with it.

Learning to eat like a normal person, though, is the least of her worries. When hostile aliens interrupt her attempt to get herself and her Marines home to Earth, she'll have to evade capture and figure out what really matters to her.

Who is she? How can she help? What can she even do a zillion light years from everything she's ever known?

Five lives hang on the answers, and she doesn't even know where to start.