Your story, although not my genre, is quite good! I like the way you express Lexi's suffering via her hands (if you know what I mean, and you're the author, so you do.)
Keep up the good work! My only piece of advice to give you is to be consistent in the use of tense. Aside from that, fantastic book.
I do apologize though. I am more of a Fantasy-person (magic and shït like that), so I may or may not 'get' the plot.
Haha