From the introduction to the rulebook:
Welcome to Warhammer Fantasy Roleplay. Marvellous things await you. One of your group will control an entire world, while the rest of you will live in and explore it, uncovering glittering wonders, vile darkness, and everything in between.
You’ll meet glorious heroes who grimace disdainfully as they step over the suffering poor, and corrupt villains who set down the wrong path in the service of a more laudable cause. Feared but respected wizards master their arts in the high towers of the Colleges of Magic, while outside those safe halls magic users are feared and reviled — and often with good cause, as many dark sorcerers would gladly sell their souls for power. Virtuous priests strive endlessly to improve the lives of the downtrodden, whilst agents of Chaos Gods work to undermine this good work and bring ruination.
Prepare yourself for the struggle of the gutter, to fight for your survival, and to face corruption on all sides. Prepare yourself for danger, as it is everywhere, and you can’t face it alone. And, most of all, prepare yourself for the grim and perilous adventure of Warhammer Fantasy Roleplay!