The remnant archipelago of Britannia is a divided dystopia. Up above the toxic clouds, carousing playboy billionaire - and hellishly self-obsessed nepo baby - Napoleon Moon (Paterson Joseph) lives the high life as one of the ultra-rich residents of Zenith Prime’s gaudy towers; while in the gutter at the bottom, Cash (Danielle Vitalis) scrapes a living as one of Britannia’s ‘zeroes’. Their two lives collide when they’re forced to embark on a desperate odyssey to reclaim their existence.