How to win a lost war? The aggressive bloods that humanity encountered during the exploration of the Galaxy inflict crushing defeats on the Commonwealth and destroy planets colonized by humans. Alien technology is significantly superior to Earth's, and the enemy's cruelty will shock even the sergeants of the assault infantry. To understand the psychology of the enemy and save humanity from extermination, paratrooper Serge van Grimm and captain of the analytical intelligence department Evert Waldo have to go to one of the planets in the sphere of influence of the kroverns...