Introduction of main character

Grace Wayne is the daughter of Alice and Damian Wayne.
When the J-Twins (the jokers' children) travels in time, they trap Grace in the past. The time when her Uncle Dick was Nightwing, her grandfather was Batman and her own father just came out from The League Of Assassins?
Will Bart actually get Grace to fall for him or will he just get her to hate him more?
What will Grace do to get back?
Will she ever get back?

DISCLAIMER:
I do not own anything of this story besides Grace (and some others) the rest belongs to The DC Universe nor do i own the book cover