Abandoned as a baby by his father because of his strange appearance, Rex was raised by an Immortal into the ultimate monster hunter. Years later, his search for kin leads him to the Radiant Knights. His mother instantly recognizes him, but his commander father rejects him, despising his hunter status. When the Templar Order crushed the Radiant Knights in a surprise attack, leaving his mother dying. Rex’s sister reveals the truth of his heritage—prompting him to step in and turn the tide.