Set 19 years after the events of "Harry Potter and the Deathly Hallows", the story follows Harry Potter, now a Ministry employee, and his youngest son, Albus Severus Potter, who struggles with the weight of his family's legacy. Albus befriends Scorpius Malfoy, and together they embark on a time-traveling adventure to prevent the death of Cedric Diggory. Their actions, however, lead to unintended consequences, creating alternate realities that threaten the wizarding world .