After Three Years in Prison, Zhenlong Is Released from Prison!

Three years ago, Chu Fan went to jail for his fiancée's crime, but was bribed and sent to the notorious Black Dragon Prison. On the first day of his imprisonment, the knife stabbed into his heart nearly killed him. Fortunately, a dragon heart gave him a new life. Three years later, when he walked out of the prison door, his former fiancée had already married someone else. The old man Long who rescued him only made one request: to detoxify his little granddaughter who was poisoned by evil spirits. However, in fact, Old Man Long wants him to become a knife, a knife that can eliminate the cancer in the Dragon Emperor Palace! Three years later, he walked out of the prison door, but his life had changed. Whether it was his fiancée who betrayed him or his beloved sworn sister, he would have to pay the price in blood for his sins!