An explorer finds a great library in the East which contains books that detail the story of Atlantis. Atlantis vanished beneath the waves because a commoner partook of a black magic potion so he could gain the love of the vizier's daughter. The potion made him so large that Atlantis sunk under his weight and he became too large for the Earth itself to hold him and he fell off the planet and died.; Sun Girl investigates a group of Incas in Mexico conducting sacrifices to the sun. Their leader has been educated in schools of the outside world, and so is not frightened by an occurrence of an eclipse, but he neglects to educate his people. Sun Girl convinces the superstitious villagers that the sun god is angry and they destroy their evil leader and free her.