Synopsis
Two brothers cruise on their hover bikes until a massive metal fortress blocks their path. A short skirmish ensues, and they succeed in inflicting serious damage on the structure. The fortress flees, leaving the pair stranded in a wasteland. There, they encounter nomads who reveal that the fortress had been concealed inside a mountain. The nomads beg the brothers to complete the mission. Two locals accompany them as guides, and along the journey, they acquire the aid of a fairy who can assume the form of a mecha-warrior woman.