The five people met on an unsolved missing case in Jiangnan.
They travel together on waterways, break into deserted villages, and solve a series of mysteries along the way.
Everyone carries a past that they don't want to mention.
Chasing the murderer is the way forward, and seeking the root is the true intention.
The swordsmen refused to give in to each other, and each thought about the past for a long night...
Intention: Obsession and unwillingness to look back
