Almost 150 years ago, young prospector Noah Simmons was killed in the Hoyo del Diablo cavern beneath the Arizona desert. Now, after a century and a half of haunting his lonely cave, he watches a group of settlers arrive, including a lovely young woman...
Scientist Liz Madison would rather cross paths with the legendary ghost of Hoyo del Diablo than with the handsome, arrogant geologist Ethan Winslow. But marrying Ethan--temporarily--is the only way she can join the new BioCave experiment. In such close quarters, living as husband and wife, Liz and Ethan fight against a powerful attraction neither of them want. Then Liz begins to sense a strange presence--calling her name, moving her equipment. And when Noah appears, warning her of dangerous forces in the cave, her head and her heart argue over what to tell her new husband. Can Ethan be trusted to see the truth--and fight for the survival of their newfound happiness?