Her father-in-law was brutally murdered. In order to help her junior sister Meng Ying and the Meng Group behind her, Zhou Wanqing, a gold medal lawyer, defended her father-in-law's killer in court and helped him be acquitted. She also forced the male protagonist He Chen to sign a letter of understanding in exchange for compensation. He Chen was completely heartbroken and broke up. He unexpectedly found a key recording among his father-in-law's belongings, revealing the shocking truth that his wife had colluded with the Meng family and that his father-in-law had actually been silenced. In order to avenge his father-in-law's injustice, he was determined to make all sinners pay the price at all costs.