文承年间，虎贲暗卫盘踞长安城多年，已根深蒂固。淮南县衙主簿胡濙收到帝王姬武阳秘密诏书，被急调入国都长安，铲除奸佞。虎贲将军言凤山不甘于大权旁落，集结虎贲暗卫的势力企图裂国而治、自立为王。他以长安城中的藏兵巷作为掩护，将暗卫分布其中，一直在寻找反击的时机。在姬武阳的帮助下，胡濙联合忠义将领顾玉、剑客叶峥、画师白莞、年轻文士谢子凌等人以智谋捣毁藏兵巷，摧毁言凤山妄图裂国的阴谋，还长安城风朗气清。

During the reign of Emperor Wencheng, the Tiger Guards secretly controlled Chang'an, growing in power. Hu Yiáng, a government official from Huainan County, is called to the capital by Emperor Ji Wuyang to eliminate corrupt officials. General Yan Fengshan, leader of the Tiger Guards, refuses to relinquish power and plots to split the nation and make himself king. He hides his forces in "Soldiers' Alley," waiting for the right moment to strike.

With the emperor’s support, Hu Yiáng allies with General Gu Yu, swordsman Ye Zheng, painter Bai Wan, and scholar Xie Ziling. Together, they use their wisdom to destroy "Soldiers' Alley" and stop Yan Fengshan’s plan, restoring peace to Chang'an.