Why does Little Red Riding Hood show the Big bad Wolf the direction?

Does kissing a sticky frog mean keeping a promise?

Attorney Zhang Zheng-xu accidentally finds out that his former client, Tang Shi-cheng, is embroidered in yet another sexual assault case. Seventeen years ago, young Zhang Zheng-xu got to know and fall for a smart and active girl, Chen Xin. He was however young and eager to advance his career. Under the guidance of a senior attorney, Du Zi-zhen, he defended and got Tang Shi-cheng acquitted of a sexual assault charge. Right now, he is facing his former mentor and former client. Zhang Zheng-xu decides to right the past wrong and avenges the girl whom he once loved deeply. He will pursue his version of justice at all costs.