400 years after the nuclear war, Ark, a massive air strike shelter city. Anhelm, who lost in a power struggle with his half-brother, indulges in perverted sex as a rebellion against his brother's abnormal obsession. Then one day, he got caught involved in a hostage crisis situation carried out by a man from outside the Ark. A handsome, cold-eyed man who showed up out of nowhere. 'Outers,' the contaminated human beings expatriated from the Ark. Convince that he is not at least an assassin sent by his brother, Anhelm instead persuades the criminal to kidnap him...