Harry Potter and the Cursed Child is a play that picks up the story of Hogwarts School of Witchcraft and Wizardry when Harry, Ron, and Hermione's children are students there. Albus Potter has been sorted into Slytherin, and he quickly becomes close friends with Scorpius Malfoy, the son of Harry's archrival, Draco.

One of the major plot points in this play is the trouble that can be caused by messing with the passage of time. While Draco is plagued by rumors that his son was actually Voldemort's child, Amos Diggory and his niece visit Harry and implore him to go back in time to the Triwizard Tournament to save Amos's son, Cedric, who was murdered by Voldemort while trying to complete the third task.

The script also explores Harry's difficulties in relating to his son Albus, who then offers to help the Diggorys by stealing a Time-Turner and going back twenty-two years, to Harry's fourth year, when the Triwizard Tournament was held. They discover that moving backwards and forwards in time is an extremely complicated affair, and at one stage, they end up in a version of their world in which Harry was killed during the Battle of Hogwarts.

With Harry's acute understanding of the dangers of changing the future, he is forced to watch his parents being murdered. In a nutshell, this play is a somewhat strange but extremely interesting glimpse into the future lives of the characters so loved in the original Harry Potter series.