In the kingdom of Hudor, lakes and rivers no longer exist. The cities wage ruthless wars for access to drinking water while hordes of brigands roam the territory and sow terror. However, a glimmer of hope animates the sages and warlords. According to legend, descendants of the Blue Tigers live among the peoples of the continent. They would wait for the return of the Goddess of the Waters to manifest and overthrow the fiery forces that have ravaged the earth since the Great Warming. In a village in the heart of the desert, twins, a brother and a sister with opposite personalities, prepare like all the young people of the kingdom to participate in the great annual tournament of warriors. They are far from suspecting that their life is about to change.