When the mining settlement at the Throat of Valmar came under surprise attack, it was the end of the world for Kayvon and his fellow miners. In the end, who else but the alien raiders caused the death of many settlements throughout the Imperium... But hope for salvation returned in the person of the Onyx squad of the Deathwatch. For the Space Wolf Ingvar, who is in the service of the Ordo Xenos, this mission is simply a chance to bring death to his enemies in the name of the All-Father. But when the situation begins to get out of control, Ingvar and his companions have to make a decision that will probably torment their conscience after the end of the mission.