Fiori is going through one of the most difficult periods of its existence. A civil war of destruction, invaders from neighboring countries invading the country, an economic blockade... Atti del Parda, relying on his loyal comrades, is making every effort to restore peace and tranquility in the country, to destroy traitors and interventionists. A new person enters his circle of friends, a simple apprentice who has demonstrated incredible talents. But mystery surrounds the past of the mysterious Serg Stel. A military genius, an excellent strategist, a unique engineer - many talents rolled into one. But who is he really, this medieval genius, who bears the well-deserved nickname Horror Ryoko?