Orphan Rin trades potions in the shop of adoptive parents. Harsh life promises to be a nightmare, because Rin will have an unequal marriage. The only chance to avoid this fate is to pass the exam at the Sinegard military academy. But achieving the goal is only the beginning in the chain of tests. The Mugen Federation unleashed a war, and Rin will have to forget about the humiliation suffered, fighting shoulder to shoulder with offenders, taste betrayal and make a choice - whether to remain a man, or become a shaman - a guide of a cruel god.