From the introduction:
Power. Throughout history, men and women have chased after power of any sort they could find, from political power to economic power to personal power to the power of magic, and for some, even the power of the divine. But among the ranks of these would-be rulers and petty brutes stand out two men in particular: the Wind Sorcerer Vaati, and the King of Thieves Ganondorf. Vaati, once a member of the noble Picori, sought first the power of dark magic, then the magical cap created by his mentor Ezlo, before finally setting his sights on the mystical Light Force that existed within Princess Zelda. His quest for power transformed him into a terrible demon, and upon being sealed away within the Four Sword, he lost his mind, becoming nothing but a lustful beast ever seeking beautiful women to be his brides.