At the very edges of space, unknown forces amass, with Mankind in their sights. There, the Deathwatch hold the line against the Xenos hordes. Recruited from all across the many Space Marine Chapters, it is both an honor and a curse to serve as humanity’s last line of defence. Stranded and alone at the very edges of the Calaphrax Cluster, on the ore-moon, Sidra, on Deathwatch Kill-Team defends a mining colony from attacking Xenos hordes. If they cannot hold the line, an unstoppable tide will swell and break across the galaxy, leaving untold destruction in its wake. Does this lone Deathwatch team, assaulted on all sides, have the strength to make their final stand?