At long last, after five years of exile, Sora returns to his birthplace—Onigashima—but he has no intention of reuniting with his former family! Rejecting Gozu and Cecil’s attempts to reconcile, he heads straight to confront his father...and walks right into a trap! The Sword Saint’s vassals have devised a plan to force Sora to face off against a formidable illusory beast known as a tsuchigumo in order to prove his strength. Sora scoffs and takes them all up on the challenge—until a new presence shows up on the island, so threatening that it stops everyone in their tracks! When total war breaks out in Onigashima, who will emerge victorious?!