We Who Do Not Exist.

"Lillian walked in a way that suggested she did not exist. Technically nobody in the Base existed. All orphans, unwanted and alone, were taken from the street and orphanages before they were old enough to know any better. Lillian wished she could tell her ten-year-old self not to trust the men in exquisite suits that offered her a home and food. Sometimes she wondered if it would have been better to die on the streets, a homeless, unwanted child. Sighing, she returned to shining her SUIT. As one of the thousand teenagers the government had on the field, she could be called upon at any moment, sent anywhere in the world, with nothing but her suit, an unknown objective, and a cranky radio. The white metal material now glistened, ready for anything. "Unit 653, on standby." Her radio whined, so that she wanted to toss it out the nearest window. Except, there were no windows in the Base. Nobody went in or out unless they had a mission. She craved the freedom that even a window would bring, a view of a world outside."
Brody, Jermey and Lillian work in The Base, a secret undercover unit of teenagers recruited to act as the government's special forces. Trained since they were all young children, they are some of the finest agents in the entire world. Nobody knows they exist... they are the invisible agents.