Receiving a serious assignment just a couple of months after graduation is not a chance for everyone. But the war dictates its terms of the game, and Lieutenant Sergei Kolchuzhin, who does not yet have any merits or even combat experience behind him, is offered to become the captain of one of the ships of the patrol squadron. Such offers are not refused, especially since it is not only about the career ambitions of the young military man, but also about the need to protect the Earth from alien invaders - Eridan. Only determination and courage, combined with endurance, will help the hero turn from an inexperienced youth into a real “moon wolf”, destroying the enemy at the point in space where he was discovered.