The cyst in the woman's body turned out to be her own biological sister.

This woman carried a pregnancy for 18 years, and astonishingly gave birth to her own biological sister. They were supposed to be twins, but the sister turned into a deformed cyst, and parasitized inside the older sister's body. Although it was a parasitic embryo within a human body, it possessed all human organs and self-awareness. In the field of medicine, it was referred to as a chimera. Eccentric Dr. Black Jack performed this kind of surgery for the first time. However, a mysterious force took control of his body. Then he actually heard the plea of the fetus, and witnessed its strong will to survive. Black Jack immediately made the decision to save the fetus. The surgery went surprisingly smoothly, and the organs of the fetus were preserved. Black Jack asked the woman how to dispose of the excised fetus, but she simply said to throw it away. Black Jack didn't listen to her and instead decided to revive the fetus. He specially prepared an artificial skin and perfectly filled and sutured the organs, giving birth to a new life. Who would become Black Jack's future assistant? Pinoco. Since Pinoco's entire body was made of artificial skin, she didn't undergo significant changes over the years. She has become Black Jack's sweet and caring companion. However, today Pinoco had an accident, and suddenly fainted in the room. Black Jack hurriedly performed a full body examination but found no issues. Yet, the absence of any problems was the biggest problem itself. Even Black Jack had never seen such a medical record before. This will pose a new challenge for the medical field. Meanwhile, the woman from a few years ago, Yuri, who was Pinoco's sister, fell ill once again. She sent someone to find Black Jack, who initially wanted to refuse. However, when he saw the onset time, heart rate, and blood pressure on Yuri's medical record, they coincidentally matched Pinoco's. Black Jack understood that this time it was necessary to go and help. In her sleep, Pinoco murmured, Save her, please save her. But Pinoco was completely unaware of her own origin. They proceeded together and arrived at Saiwanji to find Yuri. Her haughty personality remains unchanged. Yuri demanded that Black Jack cure her immediately. She didn't need to be completely healed, but only wanted to be able to stand on the stage of the fireworks festival and dance in two months' time. Subsequently, Black Jack proposed a diagnosis fee of 1 billion as payment. He believed that this amount meant nothing to her, since Yuri was the president of the largest dance association in the country. As expected, she readily agreed. She invited Black Jack to witness her extraordinary dance performance. Titled The Egret Rises to Heaven, Pinoco was also drawn to the sound. But when the two approached, an unexpected event occurred. Both Pinoco and her sister collapsed simultaneously, and it seemed impossible for them to get closer. Pinoco was taken to a hotel, while Yuri stayed at home. Black Jack told the man that if she continued practicing dance, it would be equivalent to suicide, and she had to rest her body in the future. However, news of Yuri's illness spread throughout the entire dance association. The fireworks festival in two months was an important event. With high-ranking officials attending, they didn't want to risk tarnishing their reputation. As soon as Yuri entered, she sensed the scent of conspiracy. She understood her current situation. She offered to teach the vice president's daughter her famous dance. That night, Yuri danced gracefully like a fairy descending to the mortal realm. Her graceful dance moves shocked everyone. They knew that this was a dance that no one else could perform. Yuri shared all the details with the vice president's daughter, not with the intention of teaching her, but to prove to everyone that only she could complete this dance. However, as soon as she turned a corner, she fell into Black Jack's arms, seeing the special existence of Yuri and Pinoco. Black Jack knew that there must be some kind of connection between them. It was only after examining Yuri's family tree that he discovered the frequent occurrence of twins in their lineage. But one of them would always perish prematurely. Ancient texts reveal that the Saiwanji ancestors were even more tragic. Legend had it that the Saiwanji lineage originated from the union of a princess from an ancient kingdom and her attendant. Unfortunately, the attendant was soon murdered. The princess was saved due to her status. But at the time, twins were a rare occurrence. Pursued by her pursuers, she was given a choice, to save one child and abandon the other. In the end, the princess chose to bury one of the children together with her at the bottom of the lake, while the surviving child became the ancestor of the Saiwanji family. In subsequent generations, several sets of twins were born, but due to this curse, only one of them could survive. Black Jack realized that there must be a significant connection between them. It's not a curse. It was similar to how he saved Pinocco, which disrupted the balance of certain antibodies within Yuri's body. The key to their treatment lay within their own bodies. However, just as he was making progress, a distress call came from Pinocco, urging Black Jack to rescue her sister from the lake. Pinocco was subsequently sent to the hospital by the innkeeper. Meanwhile, at the center of the stage, Yuri continued practicing her dance. She aspired to perform the most beautiful form of the Egret Rises to Heaven. As the legend suggested that it symbolized the escape from a tragic fate. However, her body could no longer sustain her, and she collapsed into the lake. Fortunately, Black Jack arrived in time to save her. However, their vital signs were extremely weak. An immediate surgery was necessary. All the doctors are afraid to do this operation, but Black Jack expressed his ability to do so. As long as they could complete the removal of 8 tumors and organ transplantation within an hour, there was a chance of saving them. This kind of major surgery typically takes ordinary doctors around 6 hours. But with eccentric Black Jack, there was always hope. All the doctors became Black Jack's assistants. In just 15 minutes, Black Jack accurately removed all 8 tumors. The idea of exchanging their livers was based on the phenomenon of chimerism, when the tissues of twins mix together in the mother's placenta. A special substance is produced that continuously attacks Yuri. Only the organs in Pinoko's body could resist this special substance. Therefore, exchanging livers was the only hope for both of them to survive. Black Jack had performed many organ transplant surgeries before. But this time, speed was the key. The surgery took a total of 59 minutes and 42 seconds. Finally, the patient's vital signs returned to normal. Everyone cheered for Black Jack. Two months later, Yuri finally returned to the stage and performed her extraordinary dance. The family's reputation was saved, and Yuri's illness was cured. She longed to see her sister again. Black Jack said, you will never see her again. As Black Jack left, a lovely figure appeared outside the room. Yuri called out to her. Apparently, Pinoko was unaware of her existence and mistook her for one of Black Jack's patients. This meeting, however, would require Yuri's lifetime of repentance.