He was once the recognized king of the dark world, codenamed "Night Fury", but after reaching the top, he chose to proclaim his power and secluded himself in an ordinary kindergarten. He just wanted to wash away the blood on his hands in the laughter and laughter of the children and find inner peace. However, the wave of global spiritual energy recovery surged forward, and the innocent children in his class turned out to be "spiritual children" who had awakened to the ancient bloodline and rules one after another. When forces from all sides quietly approach with greed, fear or desire for control, trying to get their hands on these "future gods", this former king, now a physical fitness teacher, has to grasp the dusty sharp blade again. During the day, he is Teacher Lin who takes the children to run and play games; at night, he is the night watchman who makes all those who covet him fear. This is a guardianship battle about the future. Between the slide and the castle, between innocence and strength, he has drawn an insurmountable line of defense for the children and for the world that is about to change dramatically.
