The Lost Myth (遗失的神话) takes place in Ancaria, a world full of life and tranquility that has long been immersed in a cold war, known as the Pax Mendax, between the Holy Empire of Graecia and the Kingdom of Valgus, the two strongest powers on the continent.

But the "false peace" that reigns on the continent will disappear and the fuse of war will be rekindled. This event will cause the paths of the story's protagonists to cross, and they will face their fate together, working together to survive.

As the story unfolds, the protagonists will discover "The Truth", where all the pieces of this intriguing story will fit together.