Grimes lives in the heart of Baygard's tallest rock, which is surrounded by deadly fields of poisonous grass, useful in the manufacture of magical potions as a universal ingredient. Grimes eats everyone who wanders onto his mountain, except for the animals (and not always).

One day, Grimes hears the cracking of rocks and looks sleepily out of his cave, smelling a familiar smell: someone bigger than an animal is roaming around his mountains....