Deep under Sao Miguel island, rumoured to be the last emerging part of
Atlantis, Professor Mortimer has discovered samples of a mysterious
radioactive metal. Could it be the Atlanteans’ legendary orichalcum?
When he and his friend Blake set out on an expedition into the depths to
find out, sabotage occurs in the form of their old opponent Olrik. And
soon, all three will be embroiled in a power struggle far bigger in
scope than they could have imagined.