Ann Hunter, wealthy New York socialite, receives news of her brother's capture by natives while exploring the unknown reaches of Australia. Her brother being the only family she has left, she immediately mounts a rescue mission, which seems doomed to failure when her carriers desert her and she finds herself in a land roamed by dinosaurs and ruled by a lost race with technology far beyond her imagining. Her party only escapes certain death due to the intervention of a mysterious grey-eyed stranger who has survived in this world alone since he was a little boy. He calls himself Jongor, and feeling drawn to Ann Hunter, he vows to help her find her missing brother and escape from Lost Land!

JONGOR, SUPERHUMAN WARRIOR, IS LURED INTO DEADLY DANGER... With the help of Jongor, superhuman warrior of Lost Land, Ann Hunter has found her missing brother, Alan. Now Ann and Alan want to bring their mighty new friend, Jongor. back to civilization. But Jongor has received an urgent message from Nesca, beautiful queen of the Arklans. These strange and ancient creatures are in desperate trouble and need Jongor's help. Not realizing that Nesca's message is a trap set for him by his most dangerous enemies—the beast-men called Muros—Jongor sets off for the home of the Arklans, leading Ann and Alan into the hands of death ...

The third in the Jongar series, a kind of Tarzan of the Lost Land novel.