Xie Yun, a partner at a top law firm, made an exception during the recruitment season by hiring Tang Xiaorou, an intern with a perfect resume. She always lingers in the copy room late at night, and the old case files she brushes between her fingertips contain the shadow of the "Lin's Illegal Fund-raising Case" ten years ago - that is the truth she tracked as an investigative reporter, and it also involves the mysterious death of Xie Yun's late mentor.
When Tang Xiaorou's reporter identity was exposed in front of the encrypted files in the safe, Xie Yun did not expose it. This tug-of-war that started as a trial gradually heats up in the collision between procedural justice and factual justice: she holds the victim's bloody testimony, and he hides the recording of his mentor who risked his life to protect him; she is the pen that pierces the darkness, and he is the thread that stitches the cracks.
From the confrontation in the hotel on a rainy night to the hug outside the detention center, they glimpsed each other's beliefs in the abyss of old cases. It turns out that all the deliberate approaches were caused by Xie Yun - he needed a sharp enough knife to reveal the truth hidden by power. When the shackles of ethics are broken, love and justice will eventually hear the echo from the abyss on the ruins.
