Ximen Chui Xue (played by He Rundong) and Ye Gu Cheng (played by Yan Kuan) agreed to a showdown at the top of the Forbidden City on the night of the full moon in September. As soon as the news broke, a series of unbelievable murder cases unfolded. Lu Xiao Feng (played by Zhang Zhi Lin) had not yet managed to get to the bottom of it when his confidante Ouyang Qing (played by He Dan Dan) also fell victim to a conspiracy. To uncover the truth, Lu Xiao Feng secretly inquired and investigated, sensing that there must be hidden schemes behind the 'Battle of the Forbidden City.' As the mysteries were gradually revealed, it turned out that these turbulent events in the martial world were all part of Ye Gu Cheng's ambitious revenge plan. This ancient costume digital film is adapted from the short story 'Before and After the Showdown' from Gu Long's martial arts novel 'The Legend of Lu Xiao Feng,' directed by the renowned Hong Kong director Deng Yan Cheng, starring Zhang Zhi Lin, He Rundong, Yan Kuan, and others. Deng Yan Cheng is known as the leading director of 'Hong Kong crime genre films,' and in directing this film, he presented the most fantastical and suspenseful, most exhilarating and emotional elements of Gu Long's 'The Legend of Lu Xiao Feng' on screen, receiving widespread praise and love from martial arts fans.