The Universe where Souls Exchange

Born in the 34th Century, Li Ke Xin's (age 15) only motive was to find out the real reason behind her mother's death with the cover identity as a Healer (an investigator of medicine) but was killed by the overpowering 'Hyeorgufil Energy No. 10'. This 'energy' was no normal energy. It could save, yet kill a life. However, when she awoke again, she realized she was no longer in her modern time era, but instead was in an ancient era, where she was inside a girl named Lin Zhu'er's body. There, she met Feng Li Zhi, the powerful and kind 3rd Prince of the Huo Kingdom. Meanwhile, Lin Zhu'er (age 15), who was a well-known divine doctor in the ancient era, transmigrated to Li Ke Xin's body. Where she met Fu Jing De, the young, yet powerful and influential young master of the Fu clan. However, before Li Ke Xin and Lin Zhu'er met the 2 young men, the duo realized that both of them were able to travel to a 'personal space' where both of them would meet. The two have hence decided to help each other finish their destiny. But...when they realized they would be able to travel back to their own era, would they be willing to do so? Would they want to continue living in the world they are in now?