Six meteorites devastated the world. Six moons now orbit the sparse land. Surrounded by the ocean, a handful of gems in human form struggle to survive - hunted by the vile inhabitants of the moons who want to make jewelry from their bodies. Phosphophyllite, better known as Phos, is a young gem who dreams of joining his friends in the fight against the Lunarians. But Phos is fragile and not suited for battle. Instead, he is tasked with creating an encyclopedia about the nature and history of the world. While searching for entries for his work, he meets Cinnabarite, a poisonous gemstone that keeps lonely watch over the land at night. Soon the two friends are caught up in the turmoil of the ancient war ...