When Emery was 6 years old, an alien spacecraft crashed in her small town. Whether they came in peace or with more sinister intentions, he did not dispute: a fierce battle broke out when humans fought for control of new rivals, an alien species called the atrians. In the midst of the conflict, Roman, a 6-year-old Atrian boy, found his way to a house behind Emery’s house, where he temporarily protected him from evil, bringing him food, comfort and friendship. Ten years later, the atrians acclimatized to life on Earth, but are interned in a heavily guarded camp, known as the Sector, to keep them separate from humans. Now, for the first time, a group of atrian teenagers will enroll in a suburban human High School in order to test the feasibility of human / alien integration. Emery and Roman find themselves again in a school and in a society that does not trust the atrians. As the world around them scares with anger and prejudice, their bond becomes stronger and more dangerous.