Prologue: Platform 9 and 3/4.

It's Lily Luna Potter's Fifth year at Hogwarts, and it's only now that she's realising just why her brother Albus was so estranged to her family, and why that all changed.
But she's also finding secrets her stuck up cousin would rather her forget.
It's her first year without James, so she's going to make sure it's remembered. By everyone.

To fully understand this I would suggest reading Harry Potter and the Cursed Child as well as the rest of the series.