Zhang Qiansheng, a veteran criminal defense lawyer with over 30 years of experience and more than 2000 successful lawsuits, has amassed a considerable fortune defending wealthy clients. In court, he is a formidable figure, striking fear into the hearts of his opponents. However, a mishap leads to his soul inhabiting the body of Zhang Wei, a law student in a parallel world. From then on, the ordinary law student Zhang Wei transforms into an invincible lawyer! With the help of a kind-hearted individual, the cold and ruthless lawyer Zhang Qiansheng gradually becomes the righteous and compassionate lawyer Zhang Wei.