Secret Tracking

In the thirteenth year of Chongzhen, the Sanhe wine brewed by Zhangjia Winery in Yaowo Town became famous all over the world. It was widely spread in the martial arts world that the secret recipe for brewing Sanhe wine contained a set of profound martial arts skills. Whoever could obtain and practice peerless martial arts could dominate the world. For a time, masters of martial arts gathered in Yaowo Town to wait for the opportunity. The small Yaowo Town was suddenly filled with murderous intentions. A battle between justice and evil, selfishness and sacrifice of life spread like a cloud in the rivers and lakes. The murder of the old shopkeeper of Zhangjia Winery was the beginning of the turmoil in Yaowo Town. On the day that old shopkeeper Zhang was killed, a bald man wearing official boots came to Zhangjia Winery. The bald man saw old shopkeeper Zhang and claimed to be Yin Jiachuan, the son of Yin Haishan from Lingnan. Yin Haishan and Mr. Zhang are brothers. Yin Jiachuan came here to meet his uncle according to his father's last will and at the same time get the other half of the secret book that his master gave to Mr. Zhang for safekeeping. The secret book is engraved on the gold medal, which is a hidden poem with four hidden lines. The hidden place of the secret book is at the place pointed by the four hidden poems. Only by combining the two gold medals into one can you know where the secret book is hidden. Shopkeeper Zhang respected his master's will and did not hand over the gold medal to the ambitious Yin Jiachuan, but he brought trouble to his own life. Who is the murderer of Mr. Zhang? ...