By the end of the 13th century, the Mongol Empire had crushed entire nations in its attempts to conquer the East. Tsushima Island is the only one between mainland Japan and a huge Mongol invasion fleet, led by the ruthless and cunning General Khotun Khan.

The island is on fire after the first wave of Mongolian attacks and samurai warrior Jin Sakai is one of the last surviving members of his clan. He is determined to do whatever it takes, cost whatever it takes, to protect his people and take back his home. He must disregard the traditions that have shaped him as a warrior and pave a new path, the path of the ghost, and fight an unconventional war for Tsushimas freedom.