After the Final World War, the Hawaiian Federation stands alone as the world's last sovereign nation. Surrounded by deadly waters, its continued existence relies heavily on the Indigo vaccine, an injection given to children at the age of fifteen to stave off horrifying effects induced by poisonous nuclear fallout particles called Carcinogens. But the Indigo vaccine is always in short supply, exacerbated by attacks from thieves who wish to steal Indigo for themselves, capitalizing on its scarcity to generate profits and pull apart the very fabric of society. After surviving such an attack, fifteen-year-old Kai Bradbury is declared an enemy of the state by the Feds. Captured by the Lost Boys-the world's deadliest band of misfits-he must find a way to escape, prove his innocence, and save those he loves before it's too late. He must become what the world fears most: an Indigo thief.