Li Qing transmigrated back to ancient times. The good news is that the original owner was beautiful as... Ahem, I mean, devastatingly handsome, and can live forever!
The bad news is that rumors in the martial world say eating his flesh will keep you looking young forever. How is that any different from Tang Sanzang falling into a demon's cave!!!
System: Your mission is to clear the original owner's name and reclaim everything.
Li Qing: I'm going to lie flat. I'm a modern person who doesn't know any martial arts. I can't do it.
System: You can solve cases to obtain seeds for spiritual herbs.
Li Qing: What? I can even develop new spiritual herbs? I finally get to return to my old line of work!
System: But spiritual herbs have side effects. They will cause the original owner to return to your body for a while.
Li Qing: Bring it on. But why do I always get sent back whenever I'm in danger?
After overcoming countless obstacles, Li Qing finally met the original owner's childhood sweetheart. Wait, no, big sis, who are you? You're at least twelve years older than me.
Key points: A modern PhD in botany transmigrates into a wuxia world, which is entirely fictional. She solves cases to collect items, develops immortal herbs, and helps the original owner clear his name and get revenge. By the time she transmigrates, twenty years have passed since the story began. The original owner has kept his youthful appearance thanks to his immortality.
Theme: An immortal life, used to settle brief betrayals and eternal conspiracies.