This play is adapted from the novel written by Brother Pure Love and Sharp. The hero of the story accidentally traveled to ancient times. When he woke up, he found that he had become a door-to-door son-in-law. Here, he is recognized as a waste, doing nothing all day long. Soon he ushered in the wedding night, but he was lying in bed. On the bed of the bride's best friend, and then accidentally went to the brothel. His wife was very disappointed with him. The old man decided to let him go to the family's martial arts hall and let him toss about. Who knows that he accidentally got a treasure, and this treasure needs him to go. Constantly devouring various metals, every time he devours a metal, he can repair a crack and thus strengthen his own strength. Since then, the male protagonist has been secretly hiding his strength, and has been helping the old man's family through the difficulties in the dark, trying to slowly restore his image in the hearts of his family. One day, someone wanted to take the hero's wife as his apprentice. The hero joined the Taoist sect in desperation and wanted to take his wife back, but by mistake, he assumed the important task of the Taoist sect..