For Shion, an elite student in the technologically sophisticated city No. 6, life is carefully choreographed. School, study, and the occasional visit with his friend and classmate Safu. One fateful day, however, he takes a misstep, sheltering an injured boy his age from a typhoon. Known only as Rat, this boy is a VC—a fugitive living outside the computerized tapestry of city control—and helping him will throw Shion's life into chaos and start him down a path to discovering the appalling secrets behind the superficial perfection of No. 6.Praise for the anime: Sadly beautiful in places, hauntingly violent in others, No. 6 [is] worth your time." —Anime News Network "No. 6 is science fiction the way it's meant to be—boundary pushing ... and completely spellbinding." —Inside AX"
With the help of the enigmatic Rat, Shion becomes a fugitive, escaping No. 6 and getting his first glimpse of the desperation and violence that are facts of life outside the city wall. And as Shion learns more about the secret that forced him into exile, his loyalty to the people he left behind and Rat's thirst for revenge threaten to tear the pair apart!