Deathwatch Chaplain Ortan Cassius, the most honoured battle-brother of the Ultramarines Chapter, is called before a council of watch captains to account for his recent actions – namely the destruction of the Imperial Port Cepheus. With many of his former kill team still unaccounted for, he must justify his use of such extreme measures or face permanent dismissal from the Deathwatch. But Cassius is unconvinced of his superiors’ motives, and begins to delve deeper into the mysterious Ghosar Enigma… Read it because It's the final instalment in the series, and this time the focus is Chaplain Cassius himself. Discover the hidden past of the future hero of the Tyrannic Wars and his role in one of the most renowned missions of the alien-hunting Deathwatch.