Our tale starts with two protagonists: Gustave, heir to an esteemed royal line, and Wil, a young man who makes his way in the world performing excavation work. Though born in the same era, their circumstances could not be more different, and as Gustave is faced with strife and conflict between nations, Wil finds himself confronting a world-threatening calamity that lurks in the shadows. Their stories gradually coalesce to form a single history.