Arne Saknussemm, a learned Alchemist of the sixteenth century, to be charged with heresy, fleeing from the face of the earth, he returns to an opening within the depths of an extinct volcano known as Snaeffels. Within the entrance of the caverns, he journey's yet through other avenues with discoveries new and perilous. Finding wonders unthinkable. In his travels, he encounters a world of prehistoric creatures surviving in a terrain...