An inexplicable cataclysm - the Breakthrough - threw several Russian settlements into another World, mortally dangerous for humans. For twenty-five years the colonists fought for the right to simply live on this land. Including, they fought among themselves. But now a true enemy has been found, who has decided to enslave all people. And the colonists united in the fight against him. Viktor Akhromeyev, commander of the reconnaissance group of the Green City, true to his duty, is ready to go to the forefront of the attack, protecting his own. Just as his mentors taught him. But danger always lurks where it is not expected. And in the World of Colonies, only those who fight to the death live and win.