In the middle of the Republic of China, the second young master of the Su family single-handedly restored the ancestral pharmacy brand "Materia Medica", which attracted the covetousness of all drug dealers. The fourth son of the Su family was originally the illegitimate son of the father of the four brothers and his daughter. He was not favored by others, but he was taken in by the second son and loved very much. The second young master was unwilling to betray his country and seek glory, so he was eventually pushed to the guillotine. The two were separated by yin and yang.