The Headmasters is a young adult science fiction novel set one hundred years in the future. The story is told from the main character, Maple's, point of view. Blue Ring, where Maple lives, is inhabited by Headmasters, a species of bug that arrived sixty years prior, after an event that wiped out all other human life on the planet. The headmasters are a parasitic species that attach to the back of their human host and control their actions. When a host dies, their headmaster is transferred to a new host.
