Once the war was over. Many people were left without there love ones. So, the golden trio and others decided to go back in time and attempt to change it by watching the movies.
Harry Potters Sister / Malfoy
Slytherin
Harry learns things about his life he never would've before gaining a new family member and reuniting with old ones, coming to terms with people trying to control his life and doing his best to crush them in his shadow.