Fuuko Izumo has lived in isolation since discovering her ability "Unluck": anyone who touches her skin suffers catastrophic misfortune. When she meets Andy, an immortal man whose "Undead" power makes him unkillable, he sees her as his ticket to the perfect death. Together they attract the attention of the Union, a secret organization of Negators who police supernatural phenomena called UMAs, and are drawn into its ranks.