It has been four years since the members of the Survey Corps reached the sea. From the diaries of Grisha Yeager people learned that all this time they were opposed not only to the Titans, but also to another nation. Across the sea, Marlia ends a long war with the troops of the Middle East Alliance. A nation that has always relied on titans in war realizes that it is gradually losing its leadership in military confrontation due to the buildup of military power by other states and the development of anti-titan weapons. To maintain her leading position on the world stage, Marlia needs the power of the Founding Titan, the strongest of the nine Primal Titans, able to control other titans. Unfortunately for Marlia, this power is still in the hands of Eren Yeager on Paradise Island. Rainer Brown - the only warrior who returned after a failed operation to capture the Founder, will once again face his former comrades. The screen version of the eighth and ninth story arcs of the manga of the same name for by Hajime Isayama.