Germany, 1589: the townspeople of Cologne, Germany pronounce a sentence of death on a mass-murderer who has stalked the countryside in the guise of a ferocious wolf. Russia, 1812: retreating from Napoléon's invading forces, a merchant's daughter is rescued from bandits by a handsome partisan with a ravenous appetite. Brazil, 2080: The Doctor and Turlough arrive for the Rio de Janeiro carnival. Time is running out for Rosa, Ileana and the Doctor, as the fearsome shadow of an ancient werewolf moves ever closer...