A strange mystery connects the whispering moai statues of Easter Island to the eerie ghost ship of Chiloé Island, leading Indiana Jones on a dangerous quest into a hidden interior world. Earlier Indy accidently caused an imbalance between the two worlds when he disposed of a fabled but dangerous relic. Now, the leader of an unstoppable army uses this artifact to enter our world and form a deadly alliance with an even darker force...

For centuries man has told tales of a hollow earth, or an underworld, populated by a mysterious race and strange characters. Sometimes describing an underworld of death, sometimes another dimension, these stories tell of mermaids, ghost ships...and a cosmic balance that must be restored lest the powers within march to conquer the outside world--and only Indiana Jones holds the key!