In Japan in the year 1600, at the dawn of a century-defining civil war, Lord Yoshii Toranaga is fighting for his life as his enemies on the Council of Regents unite against him, when a mysterious European ship is found marooned in a nearby fishing village.

Set after the battle between Godzilla and the Titans, revealing that monsters are real, follows one family's journey to uncover its buried secrets and a legacy linking them to Monarch.