Overview: On a war-torn battlefront, Astra Militarum forces fight for survival against endless waves of Tyranids. Eoin, a messenger, must deliver a crucial communique from the Cadian commander to the central command staff, and Sergeant Harlan is given the task of keeping him alive. Together the two make their way through embattled trench lines and face the horrors of grinding warfare to deliver Eoin's vital message.