Cress

Their best hope lies with Cress, a girl trapped on a satellite since childhood who's only ever had her netscreens as company. All that screen time has made Cress an excellent hacker. Unfortunately, she's being force to work for Queen Levana, and she's just received to track down Cinder and her handsome accomplice.
When a daring rescue of Cress goes awry, the group is splintered. Cress finally has her freedom, but it comes at a higher price than she'd ever expected. Meanwhile, Queen Levana will let will let nothing prevent her marriage to emperor Kai, especially the cyborg mechanic. Cress, Scarlet, and Cinder may not have signed up to save the world, but they may be the only hope the world has.