The saint is selfish, the bad man is sincere.
In 3520, humans discovered that the source of life was an "evergreen tree" - everyone's life and death were tied to a leaf on the tree.
The world is thus divided into three classes: the upper class is in power and picks leaves, the middle class borrows knives to kill people, and the lower class is like falling into purgatory.
Shi Yan was born at the top level and was regarded as a glorious "saint" by the world. He enforced the law impartially and picked off the evildoers' leaves, but he was reviled by the powerful and betrayed by his relatives. Until he met Shen An on death row - a "bad man" who came from the bottom, was decisive in killing, but had never harmed his compatriots.
For the first time, the saint was selfish, took desperate risks, and tried to change the situation.
For the first time, the bad guy has a weakness, and he is willing to go into the quagmire and support him to the top.
But the evergreen tree still has lush branches and leaves, and the people under the tree are destined to owe each other until death.
Intent: Caught between power and class, can love and protection become the only meaning?