Synopsis：Song Yin (played by Song Yang) is assigned to investigate the production and trafficking of "Jile Gao". During the case, he receives help from the wandering knight Ye Sha, physician Yan Yunsheng (played by Chen Linong), and pharmacist Su'e (played by Jiang Peiyao). Through tenacious battles and courageous sacrifices, they tear apart the protective umbrella of crime boss Bai Qinian, restoring peace to the region. Song Yin continues his long journey to eliminate evil and uphold justice.