Waking up in a mysterious, unfamiliar cavern with no memory of who he is, a young boy delves into the rocky tunnels in search of clues to his wherabouts and his identity. Meanwhile, a mad doctor makes use of an enchanted crown to enslave a race of rabbit-like creatures, known as Mimigas. As the boy travels through the cave, searching for an exit, he meets Sue, a mimiga unlike all the others. Soon he is caught up in an adventure beyond imagination as the fate of both human and mimiga races hang in the balance.