Rosalia and Rua have been wandering the wilds since their escape from Kurgh's flying fortress. So no wonder they're overjoyed when they spot an inviting desert oasis. With their spirits refreshed, the insatiable Rua figures it's time for a little fun with her friend. But fun turns to fear when they're surrounded by Imperial soldiers. The women and the Imperials have forgotten that in this arid country, oasis lakes are often the home of giant sand crabs that don't like to be disturbed! Meanwhile, Princess Minerva is set on vengeance against Kurgh. But when Imperial fighters appear off their wing, the captain of her transport aircraft decides to sell her out.