My father-in-law died under mysterious circumstances, and the killer was acquitted by none other than my wife, a top-tier lawyer. Gu Chengyu endured everything in silence for eight years, until he discovered a shocking conspiracy hidden in the letter of forgiveness his wife handed him. Taking up his long-dormant law license once again, he follows the clues left behind by his father-in-law, gradually exposing the dark secrets of a real estate tycoon's money laundering and murder to silence witnesses. He vows to wield the law as his blade and seek justice for the dead.