The Soul Traveled Ten Years Ago and Fell in Love with the Late Qingmei

In a car accident, Dawn met Qingmei's sister when she was a child. She was very sad to learn that Qingmei had died a long time ago. In the near future, due to a strange combination of circumstances, she gained the ability to travel between the present and the past. There are many futures that cannot be changed and the timeline is messed up. Can the four protagonists correct the timeline?