The 3rd Platoon, 2nd Company, 51st Cadian Regiment fresh from trench purges on Duros IV has been requisitioned under Inquisitorial authority. Deployed to Rho Theta-9, an ancient naval bastion in high orbit, they are tasked with rooting out corruption that festers deep within the deck-plating.
Officially, cultist activity has been contained. Unofficially, something worse is at play.
Interrogated heretics mutter about a ancient weapon buried in dust. Rumors speak of a forgotten weapon lost during the Horus Heresy. And someone aboard this station has been feeding the enemy information...
You are here to find out who.