The Imperium burns. Adrift in the warp after the devastating Battle of Phall, a group of Imperial Fists must contend with a galaxy gone mad to fulfill their Primarch's final order; Return to Terra.

Violence and flame consumes the Shrine World of Sanctum, the latest victim of an Ork WAAAAAAGH! Amidst the carnage and death the Battle Sisters of the Order of Our Martyred Lady stand resolute against hopeless odds, ready to give their lives in the name of the Immortal God Emperor.

Loyalty to the Emperor, loyalty to the Primarch, loyalty to your Brothers. In the fires of heresy and cold steel of treachery, something has to give. Separated from their Legion in the far reaches of the galaxy, a company of astartes must choose a side, and be damned either way.

A world has fallen to the fires of heresy, its loyal citizens of the Imperium slaughtered for the amusement of blasphemous Gods. As the grinding gears of the Imperial Guard's war machine liberate the city of Vorgast, a squad of the 151st Talassarian Infantry is requisitioned by an agent of Emperor's holy Inquisition.