Jiangxi Zhangshu is one of the four major medicinal capitals in China, and for thousands of years, it has formed a responsible and righteous medicinal gang - Zhangbang. The movie "Zhang Gang" reflects the support of the Zhangshu Medicine Gang for the Northern Expedition, resisting foreign enemies, and defending traditional Chinese medicineRights, a treasure of Chinese culture, and the stories of love, hate, and hatred among the characters in the film. At the end of the Qing Dynasty and the beginning of the Republic of China, Qin Hejun, the leader of the Zhang Gang, held a secret meeting with members of the Alliance in the Qin Mansion. Unfortunately, he was betrayed by the traitor 'Jiuye' of the Chinese Revolutionary LeagueBetrayed and brutally besieged and massacred by the Qing army, Qin Hejun and others rose up to resist and ultimately sacrificed themselves. 15 years later, Qin Yudong, Qin Hejun's son, returned to Zhangshu Town to search for the enemy who killed his father. Yudong's secret investigation of his enemy's family was discoveredAfter being trapped a few times later, he narrowly escaped death. After constantly peeling the cocoon layer by layer, not only did he find the enemy who killed his father in the past - Yu Wanzhi, but he also uncovered Yu Wanzhi's conspiracy to use fake medicine to sabotage the Zhang Gang's support for the Northern Expedition. However,Qin Yudong's lover Yu Ensu is precisely the daughter of Yu Wanzhi, and it is difficult for Qin Yudong to choose between love and hate.