The Great Uniting, the event that resulted in a decade of peace after the seven hearts of lights emerged victorious over the thirteen seekers of darkness, was the key that connected the once divided worlds, creating a new realm of light that needed protecting. With these new lanes opened between worlds a great force was needed to ensure the safety of this new realm and it's inhabitants, thus the Guardians of Light, more commonly known as GOL, was created. However, a new threat has begun to rise from the darkness of the fallen; heartless are reappearing, people are disappearing, and the Masters fear that it is only a matter of time before the worlds begin to follow them.