In a distant future where the sun no longer shines, Toshiro Kamiya gives up his body to a sinister floral metamorphosis for a payday.
Kamiya is trying to make the most of the time he has left before completing his spiriflor transformation. But when his childhood friend Hourai becomes the latest victim of a mysterious spiriflor that somehow remains capable of humanlike movement and functioning, he finds himself drawn into the hunt for this deadly creature.
