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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...
In a world devastated by a nuclear disaster 400 years ago, the privileged few found refuge in the Ark, while the outsiders mutated into beasts. Helm, a young biologist in the Ark, lives a life of indulgence…or so it would seem. Reluctantly engaged in a power struggle with his own half-brother, Helm spends his days indulging in frivolity in an attempt to stay free from his brother’s clutches. Yet his life takes a surprising turn when a captivating outsider tries to hold him hostage. Faced with a choice, Helm escapes the Ark, only to realize that the dangers outside may be more treacherous than he ever imagined…