This is the first part. You will probably understand better if you watch this one first. (=・ω・=)
http://www.mangago.zone/read-manga/meng_shi_zai_shang/
So from what I gather, remember before the martial world, she was in this modern world then transmigrated to the martial world and ended up being reborn and that's the other story we read. I'm guessing after the 2 lives in the martial world she somehow died and then came back to her original world and the ml followed her somehow. And now she is revenging on those who originally wronged her.
If you read the spoilers on novelupdates for the other story it may help make things clearer for you.
Can someone explain to me is this a dif character from last story or our girl reincarnated again and probably died in the last?