WHEN HIS BELOVED ONLY DAUGHTER GOES MISSING, MILLIONAIRE ENTREPRENEUR WALTER VAN DAM CALLS IN A TEAM OF EXPERTS – INCLUDING FREE-CLIMBERS, A GEOLOGIST, A PARAPSYCHOLOGIST, EVEN A MEDIUM – TO FIND HER . . . FOR ANNA-LENA HAS DISAPPEARED SOMEWHERE WITHIN A MYSTERIOUS CAVE SYSTEM UNDER THE OLD HOUSE THE FAMILY ABANDONED YEARS AGO. BUT THE RESCUERS ARE NOT THE ONLY PEOPLE ON HER TRAIL – AND THERE ARE DANGERS IN THE UNDERGROUND LABYRINTH THAT NO ONE COULD EVER HAVE FORESEEN.