Legends tell of Vilcabamba, a lost City of Gold somewhere in the mountains of Peru, that was built by the Incas and mysteriously abandoned. One day an explorer sets out in search of this fabled city. He claims the Mountains of the Moon, descends into the Valley of the Shadows, and explores the River of the Rainbow, but the ancient city and its gold are nowhere to be found. One night, while the explorer dreams by his campfire, a voice emerges from the flames - the voice of Grandmother Fire.