Wan Guan Yuan is a century-old brand in Foshan's soy sauce industry. The head of the family, Wan Qishan (played by Wu Dairong) and his wife Xi Derong (played by Gong Ci'en), insist on the principle of "passing on the skills to men but not women, passing on the skills to insiders but not outsiders". However, a poisonous soy sauce incident forced him to agree to let Xia Xiaoman (played by Zhu Chenli) and Ye Xiyao (played by Gong Jiaxin) join the family, and become apprentices with his son Wan Zhuofeng (played by He Guangpei). The three of them established a complicated four-corner relationship with the young master of the soy sauce garden, Hua Ge (played by Wu Yikun), and indirectly revealed many secrets of the Wan family. In addition, Zhuofeng was suddenly abducted, and people were panicked. In the soy sauce garden, Qishan's brothers Qi Shi (played by Zheng Zicheng), Qi Chuan (played by Chen Jiahui) and Qi Jiang (played by Xu Rong) were planning to separate the family. Outside the soy sauce garden, Commissioner Gao Zhaorong (played by Yuan Wenjie) also conspired to seize the property of the soy sauce garden. Wan Guan Yuan's century-old foundation could be destroyed at any time!