From the back cover:
"You are an Acolyte in the service of the Emperors’ Inquisition. You stand in the front line of a great and secret war where your duty is to hunt out the foul stench of heresy, the vile alien, and the twisted influence of Chaos. You will tread where others fear, venturing to distant planets, ancient space hulks and the unsavoury depths of the under-hive.
You will never know fame nor reward, yet if you stand resolute your deeds will be whispered to the God-Emperor of Mankind and your name will be revered for millennia.
Fast character creation to get you into the game quickly, followed by a lifetime of possibilities with an expanded advanced careers system.
Dynamic rules for all eventualities th at let you handle everything from social interaction to deadly fast-paced combat, psykers and psychic powers to insanity and mutation.
Comprehensive background on the Calixis Sector, the official setting for Dark Heresy written by best-selling Warhammer 40,000 novelists Dan Abnett and Ben Counter.
A galaxy of guns to equip your acolyte, from lasguns to inferno pistols, chainswords to power blades.
Pitch your players straight into the midst of dark events with a complete adventure to get you started.The Dark Heresy core rulebook contains everything you need to start your adventure in the Warhammer 40,000 universe."