In the Dark Ages, where are things did not exist, there were only dry land, withered trees, bitter cold winds, and most of all, Primordial Giants with maximum power who ruled the world during this Dark Ages.
At this time, from the ashes of the giants war, The First Humans, the ancestors of mankind were mysteriously born as a creation bestowed by nature in search of a new age.
Adam, the ancestor of mankind, traveled across the continents, through giants, patches of land, mountain ranges, and then the second life Eva, was born by a mysterious born when Adam touched it.
The two wandered in the dark world, without food and water, and when the two "messiahs" we're dying, they found the first warm ray of the world, The Primordial Flame, open a new age for the whole world, Age of Hope. In that shabby but warm fire existed the four Lord Souls. Grymm, The God of Death. The Goddess of Life, Cinderella and the Sun Lord, Lodt. The three gods carried a Lord Soul and the other Soul no one knew anything about it.
With the power of the gods, the three lords unleashed a war against the giants, signaling the of the Dark Ages, payving thể way for the Age of Hope. After war, the giant clan was left with only traces, three gods each with a goal, located in hard-to-reach places, building powerful civilizations, Adam and Eva disappeared among thousands of people who were born.
Nothing is forever, Lodt, the Sun Lord is fascinated by the Primordial Flame, wanting it to last forever but the nature of the fire will gradually disappear over time, so he maintains the fire by sacrificing a small part of the Lord Soul to the flame every year. And at the fateful moment, the soul had finally been reduced to ashes with the flames, Lodt was now sealed with the Primordial Flame, his flesh and soul burned in pain, but he could not die, there was only one way to wait for one day, someone with the power of the Lord to come and set him free. Cinderella, the Goddess of Life, wanted the world to be a better place, people were equal, no war, no competition, so she created the Dimensional Flame in order to reconcile with the Primordial Flame to create abundant life for the world, but it was not the Dimensional Flame she wanted, it is the dark and empty, Flame of Nothingness. The fire with the power of a Lord exploded as soon as it appeared, causing the whole civilization, a whole area to fall into darkness, the life brought by the Primordial Flame to fade away, leaving only darkness and terrifying emptiness. In the end, only Grymm, the most ordinary of all three Lords, still existed true to the nature of a God.
After the opening of the Age of Hope, humans existed under the reign of the Gods, they devoted themselves to civilization, serving the Lord for the rest of their lives. When people die, they will be revived in the form of an Undead, without a name, without a past, everything as humans will be erased, no one will remember existence, that is the price to pay when revived. But the resurrection at that time no one knew even the Gods because the Undead were revived in a place deep below the Holy Tree and the Undead themselves did not know why they were revived. Because there is no memory or past, all Undead live peacefully and equally, they even build their own ecosystem of Undead and live in isolation from the world above until Lodt discovers the existence of Undead, and then divide them.
Those who are supposed to be useful will be singled out by Lodt to serve his civilization, and the weak will be sent to the Undead Prison, the last place where "humans" can survive. Perhaps it was at the discovery of Undead's life that Lodt also learned an unexpected truth.