The Black Plague has descended on the world, transforming its inhabitants into horrible creatures. The Unicorns, who have been mysteriously spared this affliction, come under suspicion from all sides. Pryzm, a brave Unicorn, and Karrock, a wise troll, reluctantly join forces as they set off in search of the source of the evil that has befallen the mountain of the Trolls, the forest of the Elves, the mountains of the Gnomes and the marshes of the Nymphs. This special duo set off on a crusade, using their magic powers to bring back to life the host of creatures which they will encounter in the course of their perilous journey.
