Mack MacAvoy, a twelve-year-old boy, is told he is one of the Magnificent Twelve and must find his eleven teammates to save the world. Teddy discovers two kidnapped boys in a remote desert town and tries to save them from a giant sycamore tree. Fifteen-year-old Kat schemes her way into boarding school to escape her family of thieves but is drawn back into a job to save her father. Theodore Boone, a thirteen-year-old who knows the ins and outs of the legal system in his small town, finds himself involved in a murder trial.