Testament is an original story set in the land of Tessara. Aran, the king of High humans, loses his divine powers and falls to the ground after being betrayed by his brother, Arva. The world has been plunged into darkness and overrun by monsters, and Aran sets out on a quest to regain his powers and confront Arva to restore Tessara to its former glory. Along the way, he must overcome various obstacles, including corrupt leaders, tainted cities, and dangerous creatures, to ultimately defeat Arva and destroy the Tree of Darkness.