The legendary crystal ceremonial mask of Kulkaan, high priest of Atlantis, was believed to have been endowed with incredible powers. During the destruction of that ancient civilisation, the mask was thought to have been shattered and irretrievably lost. Eventually, the mask was forgotten and considered a myth - but its crystal fragments have now been found by the shadowy Crystalline Order. In a wild race against time, it is now up to two children, Josh and Erica, to prevent the mask from falling intact into their hands - and to save the world from catastrophe.