Angels of Darkness follows two stories of Interrogator-Chaplain Boreas set in the past and in the present.

Fifteen years previously, Astelan, a member of the Fallen, has been captured by the Dark Angels and sent to Caliban for interrogation. His ideals and faith will be sorely tested by the Interrogator-Chaplain Boreas.

Presently, Boreas and his men have been stationed on the recruiting world of Piscina V, sworn to protect the planet and its people. However, the horrific secret of the Dark Angels emerges from the past to haunt them, sorely testing the ideals and faith of Boreas himsel