A city that disappeared over-night. Sphinxes in the jungles of the Yucatan. An overgrown Mesoamerican temple with ancient Chinese script chiseled into the stone.

All of these elements come together in the greatest adventure yet for Dr. Kathlyn Trent and her husband, world-class Egyptologist Dr. Marcus Burton.

In her latest assignment, Kathlyn goes to the Yucatan to assist in a growing mystery; Dr. Christopher Murphy, one of the top minds in Mesoamerican studies, has something of an enigma on his hands. Strange legends and rumors of sphinxes in the jungle create a puzzle that is as deadly as it is baffling.

As Kathlyn is pulled deep into the legends and truths of the Yucatan, there are external forces back at home that would see her come to ruin. Kathlyn soon finds herself fighting for her life, both professionally and personally. With her husband's help, she is able to overcome the web of complications at home and is once again lured back to Dr. Murphy's jungle dig to help solve the great mystery…why did the lost city of La Tierra Dorada de los Jaguares vanish in a single, horrible night? What do the mysterious Chinese inscriptions have to do with it? Why does Kathlyn keep having visions of murder and blood?

Only Kathlyn and Marcus can decipher the intricate mystery of the Canyon of the Sphinx before time runs out.