The epic story of Utawarerumono comes to an end in Mask of Truth, as the fate of the world will be determined by warring nations. The game features exciting SRPG battles, a colorful cast of new/familiar faces that will determine the fate of their world, a rousing original soundtrack, and the dramatic conclusion to the journey of Haku. After the events of Mask of Deception, Haku is destined to rally the nation of Ennakamuy to fight against the evil forces that now control the Yamato throne.

"...I leave Her Highness... in your hads."

"Nekone, live on... and find happiness."

With these final words, Oshtor's soul finally found peace... leaving Haku entrusted with his sister and the princess. For the sake of his friends, and to fulfill his promise, Haku casts aside the name he was given... and dons his fallen friend's mask, choosing to live on as Oshtor.

Armed with his wits and the power of Oshtor's name, Haku faces a battle more dire than any before. Nekone steels herself to support Haku through whatever comes, suppressing the pain of her brother's death. Thrier friends mourn the loss of two dear comrades: Haku, who they believe dead, and Kuon, who left them for her homeland.

It is here, on the cusp of a new conflict, where we return to this land. The flames of war are about to consume Ennakamuy... and soon, all of Yamato.