Lua falls into a trap set by the demon Chiros and falls into a fissure and deep into the earth. A mysterious young girl who leads Lua to a cavern containing the secret Chamber of the Thirteen Shaman's treats her wounds. Lua is attacked by Apbats, but is saved by the Shaman-like powers of the girl. Reading the Chamber's ancient hieroglyphics, Lua become convinced that the young girl is Zara, the Child/Shaman of Lua's ancestors. They are attacked by Chiros' lava men, but rescued by the arrival of Jason, Tann, and Kong. Escaping to the surface, Lua is determined to show Zara all the secrets of the Island Shaman's. Lua is about to give her the Primal Lightening Stone, when Zara's disguise is pierced revealing herself to be Chiros' chief servant--Harpy! Harpy uses the Stone's powers to batter Kong, but is defeated by Lua's Shaman powers.