Dr. Goodwin

While on a scientific expedition to the South Sea Islands, Dr. David Throckmartin discovers among ancient ruins the Moon Pool, a portal into Muria, an unknown underground world. After the disappearance of Throckmartin, his wife and two companions, his old friend Dr. Walter Goodwin enters Muria with a rescue party, only to confront a fantastic subterranean world filled with incredible beings, astounding scientific advances, and the worship of the most evil of all creatures, The Shining One.

Dr. Goodwin is on a botanical expedition in the Himalayas. There he meets Dick Drake, the son of one of his old science acquaintances, and other friends. They are witnesses of a strange aurora-like effect, but seemingly a deliberate one. The group is saved from death in the mountains by a magnificent woman they get to know as Norhala. They are led to a hidden valley occupied by what they name "The Metal Monster", a strange metal city occupied by the metal animate "Things" Norhala commands.