The Noble Ultramarines are a Space Marine Chapter that represents the best of the Adeptus Astartes, genetically enhanced warriors who steadfastly defend the Imperium from countless enemies. Captain Uriel Ventris, recently returned from the Eye of Terror, must redeem himself in the eyes of his battle-brothers, as even the most steadfast warrior, having passed through hell, cannot remain untainted by Chaos. When the Tau xenos attempt to occupy the planet Pavonis, Uriel is given the opportunity to rejoin his Chapter and prove in battle that his honor and courage remain impeccable.