Translated from the back:
'Sevenstroke' they called the great magic sword ages ago in Aventurien. Only the strongest among all the nations great heroes could wield it. Later it was smelted and seven magic goblets were formed from it which were hidden in different secret places all over Aventurien. If they were united 'Sevenstroke' the dangerous weapon would form anew.
This the dark powers know and they set everything in motion to bring the seven goblets under their sway. After already having carried off six of them into the temple city H'rabaal it gets precarious. It is time to recapture the goblets.