Born with a thirst for adventure, Prince Jacob does not heed his parents' warnings and ventures into the Forbidden Forest. Unfortunately for him, he accidentally tampers with the magical seal and releases evil back into the world. When the twelve diamonds and the jade centre that make up the seal are scattered across the world, the prince's father, the Jade Emperor, has no way of containing the Dark Forces, which affect the human race only and not the animals. The Jade Emperor decides that Earth must be destroyed. Wanting to undo the terrible fate that he has unleashed on Earth, Prince Jacob begs his father for a chance to find the diamonds and jade, restore the magical seal and banish the Dark Forces. The Jade Emperor knows that Prince Jacob cannot do this alone, but there is no way of knowing which humans have been corrupted by the Dark Forces. He organises a Great Race to find the bravest animals on Earth that will help Prince Jacob restore peace to the world. Gentle, tender, compassionate and merciful, Sir John Rabbit is tasked with finding the red gemstone. Despite his clumsiness and goofiness, somehow he always manages to land squarely on his rabbit's feet. But the true test will be when he faces the might of the mythical gryphon and the wrath of Mordred. Can John Rabbit help King Arthur defend Camelot from the influences of the Dark Forces and survive unscathed? And will he be able to retrieve the red gemstone and help Prince Jacob save Earth?