The great war between the Day and Night peoples has been dragging on for centuries. The endless confrontation would have long ago ended with the death of one of the parties, but the great mountains in the middle of the continent are a reliable barrier for armies, and the Castle of Sorcerers rises above the only gorge piercing the ridge from north to south. Its inhabitants interrupted their journey between the stars four hundred years ago to become guardians of the Balance of these lands. For four centuries, sorcerers have been making sure that neither side gains an advantage. Eternal war is the Balance of Day and Night. However, the scales begin to tip in favor of the Day Ones, so the Castle sends an expedition to the Corrupted Lands. There, in the Hollow Hills, a mysterious artifact of the Ancients lurks, thanks to which the people of the Night will be able to resist the army of the Day. The sorcerer Jeremiah Swift and the royal squire Chaglavi set off on a deadly journey...