Hogwyn is a young goblin who enjoys a joyful and chaotic life in the mountain dwarf mine his family calls home. But his childhood is rattled when the dwarf Sansum seeks to reclaim the mountain as his birthright. When a wizard arrives to investigate Sansum's claims concerning the mysterious disappearance of his dwarven ancestors, Hogwyn joins him in exploring the dwarven halls beneath their feet. What he encounters in the darkness will change his life forever.