Harry Potter Next Generation Time Turner

You all probably know the story by now but...
When James, Albus, Lily, Rose, Hugo, Teddy and Victoire make a mistake they get themselves stuck in the past. Will they ever get back to the present where they belong?
I'm trying to make this as different as possible because there are a lot of books that are basically the same. I don't really know if it's working and I'm running out of ideas but hey, if you still want to read it then go for it.
Completed - December 2017