The appearance of a child in the far north heralds the origin. He sets out from the far north, searching for lost memories along the way. What does the figure in the mysterious brain space foreshadow? Is their encounter a conspiracy or a coincidence? What caused the original betrayal? How will he choose when the world becomes empty? Where will his former brother's final enemy go? When the answer to the mystery is revealed and the curtain opens, a shocking song will echo throughout the world.