From the back of the book:
The Long Night is Over
The diablerie of Saulot, the waking of Mithras, the destruction of Michael the Patriarch, the return of the Dracon - it all means the time of reflection is over. The Inquisition stirs and the time to act is now. Across Europe, monarchs of the night set princes and barons at each other's undying throats. Young vampires take to the field ready to claim their domain and become powerful lords in their own right. Blood calls to blood.
The War of Princes Begins
The Dark Medieval is a very different time than the modern Final Nights. Cainites group in clans high and low, swear fealty to ancient vampiric monarchs and follow their roads of enlightenment in the same way mortals do religions. Ashen priests and princes face off in a violent world lit only by torches and fear. Dark Ages: Vampire is your complete guide to this time.