The young newcomer Kostya Markin, who is also in the new world the magician-aristocrat Kost Marg, a respected knight in the duchy, is already accustomed to fighting and winning. Engaging in battle with enemy magicians, demons and necromancers, and foiling court intrigues weaving against him became almost a daily routine. But time passes, former comrades die in battle, and new ones are not always reliable. It seems that the local gods are amused by sending him tests that are too difficult for one, and then observing: will he overcome it or not? And yesterday's earthling accepts this challenge.