From the introduction: Long ago, a group of sorcerers invaded the Sacred Realm - seeking the legendary Golden Power that was enshrined there - to make their selfish desires a reality. A battle broke out between these bandits and the spirits loyal to the Goddesses, and the would-be thieves were cast into a realm of perpetual twilight, their dark magic fused and sealed together inside of a powerful magical artifact that was then broken into four pieces. Eventually, these events- like many other important events of the past- faded from memory, passing into the realm of myth and legend.