The Main Rulebook contains the core rules for the Dark Fantasy system: character generation, attributes, skills, experience, task resolution, combat, equipment and an assortment of optional rules.
From the Introduction:
Dark Fantasy is set in the Age of Darkness in Europe from 800 to 1200AD though history is not quite as we have been taught. There are knights, chivalry and holy wars though, the world has not yet forgotten Magic. It is an age of legends and dreams.