During the Chongzhen period of the late Ming Dynasty, Su Yutang, a famous actor in the "Chunhe Ban", the largest opera house in the capital, amazed everyone with his song "The Palace of Eternal Life", but was involved in a fight among officials. Someone used the opera performance to deliver secret messages. Su Yutang accidentally discovered the clues and was coerced. The patriotic general Qin Feng was ordered to investigate the secret letter case and met Su Yutang. The two reached a tacit understanding, used the Liyuan performance as a cover to collect evidence, exposed the conspiracy of officials to collaborate with the enemy, and protected everyone in the Liyuan in troubled times.
