The metropolis of Lavrasia. Once a symbol of humanity's prosperity, this metropolis has turned into an earthly hell. Under the invasion of the demon emperor, Garuda. Emerging from the darkness, accompanied by hordes of monsters. In this world sealed by darkness, people are overwhelmed by despair, while Garuda's ominous laughter echoes from the skyscrapers to the skies.

Until they appeared...

Two shadows run through the fortress of evil demons. They have come from the eastern land. Silently infiltrating dangerous enemy territories, coldly executing their targets. They are dark assassins who receive significant rewards in return. However, what drives them into fierce battles is not just for the sake of the reward. The cries of sorrow and grief of the people call them. Their fervent righteous indignation and unyielding souls crush powerful enemies. When the world falls into chaos, they appear out of nowhere.