The Ultramarines are, a by-word for courage and honour. They are humanity s fiercest and most devout warriors. Honour and courage are valued above all else, except the God-Emperor himself. They are the stalwart protectors of mankind and the most dedicated of all the Space Marine Chapters.
When asked to honour an ancient debt, Captain Uriel Ventris and the Warriors of Ultramar find themselves standing shoulder to shoulder with brother Marines and local Guard units defending a vital industrial system. The threat they face is as terrifying as it is alien. The tyranids take no prisoners and show no mercy -- they consume all in an attempt to stave their unending hunger for bio-matter. Failure is not an option, but success requires the ultimate sacrifice.