"Black Lotus" lawyer Shen Zhiyao refused to be a tool for family marriage and used sharp means to tear open the dark network of the law firm. Former prosecutor Ji Linchuan secretly helped her, but concealed the entanglement with her mother's old case. When the intern took the key evidence and the investigator tried his best to deliver the accounts, the ambition of the chief's daughter Lu Mingshuang finally came to light - they were all using the law to kill people, but Shen Zhiyao would never be anyone's pawn. Shen Zhiyao pried open her mother's belongings and discovered the truth hidden in the diary, but Lu Mingshuang took it away on the grounds of trespassing. She was forced to suspend her agency, but found a note from the sole of her shoe and learned that the password in the diary was her mother's birthday. She went to the nursing home and found that her mother had an appointment with Ji Linchuan, but Ji Linchuan did not attend the appointment. At midnight, intern Jiang Zhao ventured into the archives room and recorded Lu Mingshuang's password to open the safe.
