Luke Garner, an illegal third child living with a fake ID, is going by the alias Lee Grant at the Hendricks School for Boys. Lee Grant was killed while skiing down a mountain so no one knows that he was gone except for his family. He is at first confused and paranoid, as well as treated brutally by his roommates, mainly the boy he comes to call "Jackal Boy". Eventually, Luke begins sneaking out of the school to do things, and tries to plant his own garden in the woods. This brings him great happiness and a sense that he belongs. When his garden is trampled, he realizes that other people are going outside, including Jackal Boy.
He reveals himself to them, finding out that they are other illegals as well. The leader, Scott Renault (whose real name is Jason Barstow) otherwise known as Jackal Boy, is outwardly a huge admirer of Jen Talbot, a friend of Luke's who died at a rally for third children's rights. However, the later part only to betray them. Luke is accepted into Jason's group, but is still too frightened to give his real name.
He learns more and more about Hendricks School, but never learns what his schedule is until he is asked about "finals" by Jason. He then is told that he has to take his semester final tests, and that his results will be sent to his fake parents, the Grants, who happen to be Barons, and one of the richest and most powerful people in the country. When awoken one night, he realizes Jason is gone, and Luke happens to overhear a phone conversation of Jason's, where he is talking to a Population Police officer.
Luke finally realizes who Jason really is and attacks him with a history book, causing the phone to get disconnected, and knocks out Jason. He comes up with a cover story for the Population Police officer at the other end and gets Jason down to the nurse's office. He calls Mr. Talbot, a double agent working with Population Police, and convinces him to come to Hendricks. When another officer comes, Mr. Talbot convinces them that Jason is lying about the third children and has Jason arrested along with Nina, his "accomplice" at the nearby Harlow's School for Girls, even though she has done nothing. Luke is later given the choice to leave the school, but he decides to stay at Hendricks and help the other two children.
source: Wikipedia
