This world is a bizarre mixture of magic, steam technology and firearms, travel portals and the symbiosis of three races. These races learned to coexist with each other, because otherwise their civilization - the legacy of ancient Atrid - would be wiped out from the face of the earth by strangers, alien hordes from unknown distances who penetrated through the Gates. They know no pity and preach different morals and principles. To defeat an enemy, you need to hit him in the heart. This heart is the Gate through which the hordes replenish their ranks with recruits. This is where the main character ends up on the eve of the next war. Fatum, evil fate, destiny, or maybe a lucky chance - poses the problem of choice before 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 a raid aimed at destroying the evil portal. One way raid.