The story begins with the most turbulent period of this torrent - the end of the Southern Song Dynasty. During the Xianchun period, the beacon fire in Xiangyang City illuminated half of the country, and also reflected the humblest struggles in the last days. The imperial edict forcing young men over the age of fourteen to die was like a giant net, dragging countless lives into the meat grinder of history. There is no romance of knights riding a thousand horses here. There are only the immature and numb faces on the city wall that are constantly changing, and the dark red color that soaks the land together regardless of whether they are Chinese or Mongolian inside and outside the city wall. On this background of despair, some hidden fires are still burning. Organizations like the "Red Tide Pavilion" that focus on revival and accumulate strength in the shadows are like roots buried deep in the ground, trying to grasp the afterglow of the dragon's veins that is about to completely disappear.