Dirk Pitt is on hand at a Colorado archaeological site where an ancient and mysterious artefact has been found - one that is perhaps linked to other strange objects turning up across the globe. And soon Pitt's skills and ingenuity are desperately needed to rescue the team after a suspicious explosio...

Dirk Pitt is on hand at a Colorado archaeological site where an ancient and mysterious artefact has been found - one that is perhaps linked to other strange objects turning up across the globe. And soon Pitt's skills and ingenuity are desperately needed to rescue the team after a suspicious explosion seals them deep underground.