Jin travels the long journey to find the mystical mask of power. During his travels, he encounters mongol patrols and bases, slaughtering each mongol he sees. Jin finally makes it to his destination. As he puts the mask on, the darkness consumes him. Turning Jin into the demon of tsushima.
Due to Jin's pure soul, he doesn't lose control of himself completely despite having a oni of war/vengeance within him due to the mask. Throughout the rest of his journey to save tsushima and japan, Jin will have to face his demon and the shoguns bounty.