After a fight breaks out among Fafhrd and the Grey Mouser and Diana and Catwoman, I-Ching halts it by producing the Fist of Flame. He informs them that the Flame Fist has a sister jewel, the Eye of the Ocean (which Fafhrd and the Mouser had sought), and that one can look into one gem and see what is in front of the other. Diana looks into the gem and sees Jonny Double's face.

Jonny proves to be a prisoner of Lu Shan, I-Ching's daughter, who has the Eye of the Ocean and seeks the Fist of Flame; when joined in a dimensional energy transfer matrix machine, the gems' energies can pierce dimensions, which will enable Lu Shan to enter and loot Nehwon.

Fafhrd confirms that a machine like Lu Shan's is controlled by the sorcerer Gawron, so he, the Mouser, I-Ching, Diana, and Catwoman go to infiltrate his lair. They fight their way inside just as a “random jump” of the Eye of the Ocean brings Lu Shan, some of her gang, and Jonny Double into Gawron's domain. Diana frees Jonny. I-Ching harnesses the power of both gems to teleport himself, Diana, Fafhrd, the Mouser, and Catwoman back to Earth, but Lu Shan remains stranded on Newhon. Fafhrd and the Mouser take a look at modern-day Earth, are repelled, and wish to return to their world, which wish the jewels grant.