After successfully solving the Long Wang case in the Lord's capital, King Giao Tong awarded Di Chi Nhan Kiet with the divine sword Khang Long Jian. However, Queen Vo Chan Thien, feeling envious, plotted to frame Di Chi Nhan Kiet to steal the sword. She summoned a group of 'Wonders' with magical abilities, led by Vi Tri Chan Kim, to carry out her wicked scheme. With the help of military doctor Sa Tho Trung, Di Chi Nhan Kiet escaped the dangers posed by the 'Wonders' and negotiated a truce with Vi Tri Chan Kim. Meanwhile, the assassin from the 'Wonders', Thuy Nguyet, discovered a mysterious force emerging in the city. As Di Chi Nhan Kiet confronted Vo Chan Thien's schemes, the Tang Dynasty faced increasing peril with the emergence of the 'Phong Ma Tribe' and their strange magic, signaling an impending 'Demon Extermination' war...