Atlantis Mystery

During a speleological expedition deep in the caves of the Azores, Blake and Mortimer are cut off by their old enemy Olrik, trapping them in a gaseous cavern. Surviving the odds, they are captured by a race of technologically advanced men ... who claim to be descendants of survivors from Atlantis! Then, immersed in a sinister plot led by Commander Magon to topple the wise Basileus and lead modern Atlantis in conquest of the surface world, they ally themselves with Crown Prince Ikaros to thwart Magon's megalomaniac plans. But the outcome is far from certain...