This world is a bizarre mixture of magic, steam technology and firearms, portals of movement and symbiosis of three races. These races have learned to coexist with each other, because otherwise their civilization - the legacy of the ancient Atrid - will be swept off the face of the earth by strangers, alien hordes from unknown distances that penetrated through the Gate. They know no pity and preach different morals and principles. To defeat the enemy - you need to beat him in the heart. This heart is the Gate, through which the hordes replenish their ranks with recruits. This is where the main character gets on the eve of another war. Fatum, evil rock, fate, or maybe a lucky chance - poses a choice problem for Konstantin. Without the help of new friends, he cannot get into his cozy and so familiar world, and willy-nilly he has to accept the conditions dictated by circumstances. He becomes one of the participants in the raid aimed at destroying the malicious portal. One-way raid.