Raklion is a frozen land created long ago when a storm of icy winds sealed the earth after Selupan paid the price for coveting the magic book Sekromicon.

After countless years passed, an unexplainable phenomenon emerged from the depths of Raklion. It was a curtain of light known as the "Aurora of Oblivion" and the "Whales of Oblivion" drifting through its glow. The Aurora of Oblivion completely erases the memories of anyone who gazes upon it. Names, past memories, love, and even hatred disappear, leaving behind only emptiness.

At first, people feared the place. However, over time, some began to seek oblivion willingly. To erase memories of suffering and endless war, they walked into the depths of Raklion on their own.

But the abyss was not meant only for humans. Monsters that wandered there by chance also lost their memories and now roam the frozen land driven only by instinct.

The land became a graveyard for those who lost their memories and an endless territory of oblivion. It is now known as "Forgotten Raklion."

At last, the kingdoms of the MU continent made their decision. To rescue those who disappeared into the abyss and uncover the secrets hidden within the Aurora of Oblivion, they dispatched warriors to Raklion.