Galena is a small town standing in the middle of a desert.
It developed around an ancient blue mineral called "Larimar", which is enclosed in the central "Blue Tower".

The blue mineral has a specific peculiarity: once activated, it converts solar rays into water, necessary for Galena's survival in the desert.
Unfortunately, only two selected twins, born in Galena, are capable to activate the blue mineral: they're called "Larimar twins" and they will struggle each other to achieve the complete mineral absorption.