As soon as Jiang Yichen was reincarnated, she encountered her younger brother who was still in her mother's body and wanted to steal her life force. Therefore, Jiang Yichen started beating his younger brother while he was still in his mother's womb. And the scumbag father wants to kill his wife and children and enter the ruthless path. Of course she let her father-in-law die in peace. Later, Jiang Yichen lived an ordinary life of eating, practicing, and beating his younger brother every day. But who could tell her that her mother's natal family was actually the Mu family, a medical family that existed like Taishan and Beidou in the world of cultivation. Later, Jiang Yichen became a medical practitioner with the highest medical skills but the most expensive fees in the world of cultivation. Everyone knows that medical practitioners have a special status in the world of cultivation. They are respected by others but have poor combat effectiveness. They are existences that need protection. Everyone thought Jiang Yichen, the number one medical practitioner in the world of cultivation, was also weak, but when she shocked everyone with one strike of her sword, everyone was dumbfounded. Jiang Yichen lamented that although his younger brother was a bit naughty sometimes, he was still very well-behaved most of the time. But what she didn't expect was that her brother was the reincarnation of the Demon King, and the so-called well-behaved one was only in front of her. No one knew that the cruel and sinister Demon Lord that everyone was afraid of was beaten violently by the seemingly weak medical sister again today.