On the scorched world of Schism, all life survives in huge trenches, protected from the heat of the torrid sun.

In these chasms, human colonists often find themselves at odds with the indigenous humanoids called Spiders. Jake's airship, powered by ancient technology, takes advantage of the unique terrain, but makes him valuable to both sides of local warring tribes. The captain and crew of the Sky Turtle are forced to risk everything in a fight between these followers of opposing elemental magics. If they fail, it could cost them everything.