Seventeen year-old Raya is a tester: hand-picked to secretly test powerful new inventions that mysteriously appear in an abandoned warehouse. None of the Testers know who controls the tech, but they know that governments and secret societies would kill to possess it. Testing is fun and consequence free until Raya's brother is killed in a horrific accident. Raya can't let go of her brother's death, so she begins to dig deeper. With the help of Dimitri, Raya searches for answers that have long been kept secret from the Testers. But what Dimitri and Raya don't realize, is that the answers they seek will put them in more danger than they've ever known.