巨木「軌道樹」の上に広がる「天膜」の世界で少年が出会うのは!? 滅びかけた世界を変える物語が 今 始まる――。
A world blanketed in an endless and ever-growing ocean of snow. The people eke out a living, either huddled around the roots of enormous trees dotting the surface, or high in the canopy, which spreads over the planet’s atmosphere.
