In a distant future where the sun no longer shines, Toshiro Kamiya gives up his body to a sinister floral metamorphosis for a payday. The earth of the distant future is covered in thick clouds, and the sun no longer shines. Plants wither, and oxygen is thin. To fight extinction, humankind has developed a technology that turns humans into plants, providing a small amount of oxygen. Is this process sustainable? Is it ethical? Toshiro Kamiya must consider these questions as he's faced with a difficult choice--save his family or save himself. Toshiro is trapped in the middle of conflicting agendas held by those who seek to exploit transfloration technology for their own purposes. His unique talents have led him to join Yomiko in her hunt for a lost transflorated relative. But for unclear reasons, powerful forces are attempting to stop them at every turn...