Jiang Shu thought he had buried his knife in the mud of the rainy season in the south - he quit the "Green Knife Club" three years ago and opened a watch repair shop in the old city. During the day, he listened to the chatter of his old neighbors, and at night he repaired toys for Xiaoman from the orphanage next door. It wasn't until his brother Chen Ye, who had dragged him out of the dead body, came to his door with a knife wound and the words "Zhao Shanhe is going to demolish the orphanage" that he realized that some darkness could not be escaped by hiding far away. Zhao Shanhe's "Shanhe Group" is a dark den covered in real estate skin. The "wild" he killed with his own hands now has a more ruthless face, trying to swallow up the only light he wants to protect. The watch repair knife was sharpened into a self-defense blade, and the old scars were soaked open by new blood. Jiang Shu stepped on the shadow of the past and walked back. While protecting Xiaoman and the orphanage Zhouquan, he also wanted to reveal Zhao Shanhe's life account hidden in the demolition money, but also faced the "other purpose" that Chen Ye couldn't hide in his eyes. This time he doesn't kill the "wild", but only those evil ones who want to chew up the lives of ordinary people and swallow them, even if they have to drag themselves back into the quagmire of the past.