I Cultivate Immortality in a Women’s Prison, and Leave Invincible

Five years ago, Lin Bei, heir of the Northern Frontier, watched with his own eyes as his wife, Shen Nanwei, cut off his father's head. He was then locked away in a women's prison. By chance, he became the disciple of a beautiful master in prison and learned extraordinary skills. Now he has returned at the height of his power. From then on, he walks the path of invincibility, a true dragon out of prison and roaming the city of flowers. There's nothing in this world that I, the heir, can't do. And there's no one I, the heir, can't kill. From this day on, I am the master of the world. My three sisters-in-law, are you willing to bow before me?