In the experimental City, the tyrannical Mayor and his Educators strive to make each citizen a docile, complacent member of society by controlling education. However, a group of outcast students, called the Truancy, arises to fight the Educators for control. Caught in the midst of the battle is Tack, one of the many students oppressed by the school system. When Tack meets Umasi, he finds relief and listens to Umasi's wisdom. Umasi becomes his mentor, training him physically and mentally for challenges ahead. But then Tack loses his sister during a Truancy attack, and he runs away from school and home, bent on revenge. Tack is taken in by the Truants and quickly rises as second in command to Zyid, the leader. As he becomes more involved with the Truancy, Tack is torn between following his conscience and avenging the death of his sister.