Fifteen years ago, the Mayor of the Education City was presented with an unwelcome surprise by his twin six-month-old boys. As the Mayor reluctantly accepted the two babies, he had no way of knowing that they would change the city forever…. Raised in the comfort of the Mayoral mansion, Umasi and Zen are as different as two brothers can be. Umasi is a good student; Zen an indifferent one. They love their adoptive father, but in a city where education is absolute, even he cannot keep them sheltered from the harsh realities of the school system. But when they discover that their father is responsible for their suffering, affection turns to bitterness. Umasi and Zen are thrust onto two diverging paths. One will try to destroy the City. The other will try to stop him.

In an alternate world, in a nameless totalitarian city, the autocratic Mayor rules the school system with an iron fist, with the help of his Educators. Fighting against the Mayor and his repressive Educators is a group of former students called the Truancy, whose goal is to take down the system by any means possible—at any cost. Against this backdrop, fifteen-year-old Tack is just trying to survive. His days are filled with sadistic teachers, unrelenting schoolwork, and indifferent parents. Things start to look up when he meets Umasi, a mysterious boy who runs a lemonade stand in an uninhabited district. Then someone close to Tack gets killed in the crossfire between the Educators and the Truants, and Tack swears vengeance. To achieve his purpose, he abandons his old life and joins the Truancy. There, he confronts Zyid, an enigmatic leader with his own plans for Tack. But Tack soon finds himself torn between his desire for vengeance and his growing sympathy for the Truants…. Isamu Fukui wrote Truancy during the summer of his fifteenth year. The author’s purpose is not just to entertain, but to make a statement about the futility of the endless cycle of violence in the world as well as the state of the educational system. And, as he put it, “I need to be in school myself if I want to write about it.”

As a new threat arises from outside the walls of the City, the warring Truants and Educators must join forces or be destroyed. The fate of the City is determined at last in this long-awaited conclusion to the Truancy trilogy.