Wen Xiu, a cold-faced top lawyer with a winning rate of 97%, has retired for three years due to the stigma of being framed. Lu Yu, once his most trusted assistant, now stands on the opposite side as the prosecutor. When a seemingly irrefutable financial fraud case pushed Wen Xiu into the dock, the entire Internet ridiculed him for deserved punishment. But when the lights in the courtroom went out, the testimonies collapsed, and the chain of evidence was broken, only Lu Yuan found a handwriting difference that no one noticed in the pile of evidence - he was not here to convict him, but to save him. A web of betrayal finally leads to the two of them joining forces to tear apart the dark battlefield.