During the Shaoxing period of the Southern Song Dynasty, four loyal ministers - Yue Polu (Qinglong), Yun Jinglan (Suzaku), Leng Lingshuang (White Tiger), and Long Zaiyuan (Xuanwu) - were framed by Qin Hui's party, and their families were destroyed overnight. The four people met on the way to escape, each with a blood feud, but they were led in the same direction by a mysterious last word: "The dragon is in the south, the scale is in the east, forty-nine, Shui Chao Zong".
Qin Hui's son Qin Xi led the imperial masters in hot pursuit, and the four people narrowly escaped death. However, they discovered that there was another black hand behind the pursuit - there was a bigger conspirator in the court who wanted to use the Yue family's old case to eliminate dissidents, which also involved a shocking mystery involving the change of military power, the Jin Dynasty's secrets, and palace secrets.
The four of them went all the way south, traveling through rivers and lakes, breaking through mazes, deciphering code words, and searching for the truth. From mutual suspicion to life and death trust, they finally revealed the secret of the "forty-nine" - the list of forty-nine former members left by Yue Fei during his lifetime, and the last evidence to overthrow the traitorous party.
It ends at the top of Nanshan Mountain, where the bloodlines of the four divine beasts awaken, their righteousness lasts forever, and their blood never returns to its sheath.
