Armadas of ferocious alien aggressors are descending on Earth. Monstrous creatures that devour living flesh are seizing more and more territories. Only the International Defense Forces, for which all earthly resources have been devoted to equipping and supporting them, are capable of resisting a ruthless enemy. However, the aliens are rapidly mutating, after each new clash with the armed forces of the Earth, becoming more and more invulnerable and merciless. Private international army corps Pavel Golovanov will have to take part in the most difficult battles with a monstrous enemy.