Twenty years ago, the south of the country declared disobedience to the Throne, and the fertile lands of prosperous Pellia were engulfed in the madness of war. On the side of the Challengers were not only traitorous aristocrats, but also the most vile rabble, warming their hands on the blood of others. Cities collapsed, villages burned, brutal bandits destroyed everyone who stood in their way. The fate of the royal engineer Arvel Hadden assigned him a decisive role in the final battles of the protracted confrontation. A talented inventor with his brave comrades, in the most dangerous situation, performed what could only be called a miracle...