Deliverance Lost

As the Horns Heresy divides the Imperium, Corax and his few remaining Raven Guard escape the massacre at Isstvan V. Distraught at the crippling blow dealt to his Legion, Corax returns to Terra to seek the aid of his father- the Emperor of Mankind. Granted access to ancient secrets, Corax begins to rebuild the Raven Guard, planning his revenge against his treacherous brother primarchs. But not all his remaining warriors are who they appear to be... the mysterious Alpha Legion have infiltrated the survivors.