Unforgotten (Unremembered Series #2)- Jessica Brody

After a daring escape from the scientists at Diotech who created her, Seraphina believes she is finally safe from the horrors of her past. But new threats await her and her boyfriend, Zen, at every turn as Zen falls prey to a mysterious illness and Sera's extraordinary abilities make it more and more difficult to stay hidden. Meanwhile, Diotech has developed a dangerous new weapon designed to apprehend her, a weapon that even Sera will be powerless to stop. Her only hope of saving Zen's life and defeating the company that made her is a secret buried deep within her mind. A secret that Diotech will kill to protect.