"There were Crystals, shining bright with infinite power which allowed the ancient people to build great Civilizations. But one of the ancient Kings wanted immortality and began a bloody war to gather the crystals. Blood was flowing all over the world and the Crystals slowly lost their light.
Only a few would survive the long-lasting war living in the ruins for a long period of time and after a very very long time, the Crystals slowly started to shine again. New life was born around the Crystals and the people started to have hope.
The strong will of the world split the Crystal into five pieces, and it's spread out all over the world. The divided crystals fill the world with life. People started to call them "The Crystals of Life" and the five kingdoms were built around the five crystals.
However, the fragments of the crystals scattered around got mixed with ancient people's blood and became the “Devil Gem". Whoever contacts the Devil Gem could earn deadly power. Ambitious people started to rise again.
The Five Kingdoms were trying to start a war to monopolize The Crystals of Life but not everyone was swallowed in the greed of power.
Akain, Urk, Zen, Thanatos, Hestia, Heroes from the five kingdoms arrived to stop the curse of the Devil's Gem.