The legendary mercenary army, the Eagle Regiment, ended the hundred years' War under the leadership of Colonel Griffith (voiced by Xiaohong Sakurai) and became the regular army of the kingdom of Mittland. But the pinnacle of honor was also the beginning of decline. Griffith was thrown into the death row at the bottom of the Tower of Rebirth by the king, suffering unimaginable torture, and the Eagle Regiment was reduced to rebels sneaking into the jungle wilderness, constantly being slaughtered by pursuers. After a dark and long year, Gus, the god of war (voiced by Yoshiaki Iwano), returned to the team and established deep trust with acting commander Kashika (voiced by Shing Cheng Taoji). And with the help of Princess Charlotte (voiced by Isaac Toyosaki), he ventured to save Griffith. Gus let the desperate eagle regiment see new hope, while Griffith, who had lost everything, fell to the bottom of despair. When the 216 solar eclipse appeared, Griffith and the overlord's egg met again, and the bloody feast of the devil began. Based on the original work of the same name by cartoonist Kentaro Miura, this film is the last part of the Sword Wind Legend Theatre trilogy.