In an endless sea of sand drifts the Mud Whale, a floating island city of clay and magic. In its chambers a small community clings to survival, cut off from its own history by the shadows of the past.

Katakysmós has been unleashed on Kivótos, and it is slowly consuming Chakuro and all the others who came to the village to make their last stand. Now the refugees on the Mud Whale must make the choice between fleeing through forbidden territory or making a desperate last stand of their own against the destruction of their whole world.