For two hundred years now, the population of Saitenar has been at war with the lyrinxes, intelligent winged predators from the Abyss who are ready to do anything to make this world theirs. Despite the development of war machines, clankers, and the mastery of the power of crystals - the sources of power for them - humanity is getting closer and closer to the brink of death. One by one, the enemy is destroying pockets of resistance. Tiana is one of the best masters in processing power crystals. One day she comes across an unusual crystal, which awakens a hidden talent for geomancy - the most powerful and dangerous type of Secret Arts. This talent could kill Tiana before she learns to control it. And there are extremely many people who want to take control of such power, both among allies and among enemies. Falsely accused of treason, Tiana runs to save her own life. She is being hunted by the lyrinx Rill, who plans to use her in his gruesome experiments in flesh modeling, another branch of the Arcane Art. Only geomancer can save Tiapa and Santenar. Or destroy.