In the second year of Zhide, the decisive battle between the Tang Dynasty and the Anshi rebels was imminent. Wang Zhen was ordered to infiltrate the rebels for ten years, using the pseudonym Wang Yue. He rose to the rank of Army Commander, but was suspected of betrayal by the court because the intelligence line was interrupted. His queen, Chang'an, was ordained and entered the Xiangji Temple in search of her father, and was inadvertently involved in a secret intelligence battle involving the life and death of 150,000 Tang troops.
The father and daughter are close at hand but do not recognize each other. They are fighting on their own between the enemy camp and the ancient temple. Chang'an desperately retrieved the list of rebel secret stakes left by his father from the underground palace, while Wang Zhen sent key intelligence that determined the outcome within the rebels. On the day of the bloody battle at Xiangji Temple, the Mo Dao formation rushed in like a wall, and the father and daughter reunited in the sea of blood on the mountain of corpses. Wang Zhen sent the information at the cost of his life. The Tang army won a great victory and the two capitals were recovered.
After the war, Wang Zhen was vindicated, and father and daughter were finally reunited. Many years later, Chang'an alone guarded Xiangji Temple, and the music of the piano continued under the red bean tree, keeping an everlasting light for those who burned themselves in the dark places of history.
