You're someone very rare. An Exile. They're scorned by society for their powers, hence the name. At one point they were praised as heroes, until people became bitter. They started executing the heroes, and the villains. Anyone with a power of any kind was killed upon birth. Now they keep their powers hidden, in fear of death and persecution. You've kept your powers hidden successfully. Then they created the Screen. A device that can sense powers in anyone cursed enough to have one. You've skipped the Screening. They've noticed. And they're sending people after you. People with an itchy trigger finger. Pack your bags.