The Dark Angels Space Marines are amongst the most devout of the God-Emperor’s servants. Their loyalty is seemingly beyond question and their faith almost fanatical. But the Chapter harbours a dark and horrific secret that stretches back over ten thousand years to the time of the terrible Horus Heresy. The long-buried secrets from this dark time threaten to be unleashed when Interrogator-Chaplain Boreas discovers that the line between good and evil is too easily crossed!