NEW DELHI: The wizarding saga of Harry Potter continues even 20 years since the release of the first book with the story continuing as a play, which premiered recently in London.Bound in a book form, the script 'Harry Potter and the Cursed Child' is all about 'saving the spare' alluding to the heartbreaking sacrifice of the life of 17 year-old Cedric Diggory, who was Harry's 'spare' in the fourth Potter book 'Goblet of Fire'.The Dark Lord Voldemort had then said, "Kill the spare."Now, author of the Potter series J K Rowling with the help of writer Jack Thorne and theatre director John Tiffany , takes a journey back in time to change the present and the future by altering the past.Only this time, the wheel of adventure is being steered not by the trio of Potter, Hermione Granger and Ron Weasley but an uncanny pair of Potter and Malfoy - Harry Potter's younger son Albus Severus Potter and Draco Malfoy's son Scorpius Malfoy.'The Cursed Child' takes off from where the epilogue of the final of the series ' Harry Potter and The Deathly Hallows ' left off.Both boys, owing to their skewed relationships with their respective fathers, end up becoming the best of friends. Interestingly, Albus is his first year is sorted into House Slytherin instead of Gryffindor.Albus who constantly reels under the pressure of living up to the "brave" deeds of his father, takes upon himself with Scorpius tagging along to use the Ministry of Magic's time-turner and save Cedric from being killed in the Triwizard Tournament.He tells Amos, Cedric's father, "I know what it is to be the spare. Your son didn't deserve to be killed Mr Diggory. We can help you get him back."They change certain events that lead to Cedric's death, and thus follows one roller coaster ride, actually three, to alternate realities, where either Voldemort rules, or Harry Potter is dead and Ron and Hermoine never get married.The journeys into the past serve like a quick re-run of all the previous books with flashes interspersed from the past episodes.Seeing an alive Dumbledore, Cedric and Snape evokes a sense of nostalgia and empathy among readers with Scorpius who is tempted to not return to the present.With every trip that Albus and Scorpius took by turning time, Ludo Bagman's announcement of the Triwizard Tournament, "Ladies and Gentlemen, boys and girls, I give you - the greatest - the fabulous - the one - and the only Triwizard Tournament..." becomes more and more haunting.