The Space Marines of the Dark Angels Chapter are among the most pious servants of the God-Emperor. Their loyalty seems to be beyond doubt; their faith reaches the point of fanaticism.  However, even ten thousand years after the Horus Heresy, the order is forced to hide a terrible and dark secret. The secrets of those difficult times, kept for so long, are in danger of being revealed when interrogator-chaplain Boreas realizes that the line between good and evil is so easy to cross!