Three neighboring worlds exist in which two beings—knights and ultrasnails—are inextricably bound.

The sky in the first is blood-red. There, ultrasnails devour the souls of knights and drain away all their Power. The hunt lasts a lifetime.

The sky in the second is yellow-green, and deserts and mountains rule its surface. There, ultrasnails and knights have reached an accord. Their alliance is strong and strange.

Only in the world beneath blue skies do knights destroy the snails one by one. Death on the tip of a spear stalks every horned creature.