Harry Potter and the Chamber of Secrets is a 2002 fantasy film directed by Chris Columbus and distributed by Warner Bros. Pictures. It is based on J. K. Rowling’s 1998 novel of the same name. The film is a sequel to the 2001 film Harry Potter and the Philosopher’s Stone and the second instalment in the Harry Potter film series. It was written by Steve Kloves and produced by David Heyman. Its story follows Harry Potter’s second year at Hogwarts School of Witchcraft and Wizardry as the Heir of Salazar Slytherin opens the Chamber of Secrets, unleashing a monster that petrifies the school’s denizens. The film stars Daniel Radcliffe as Harry Potter, with Rupert Grint as Ron Weasley, and Emma Watson as Hermione Granger and is also the last film to feature Richard Harris as Professor Albus Dumbledore, due to his death that same year.
Harry Potter spends the summer with The Dursleys without receiving letters from his Hogwarts friends. In his room, Harry meets Dobby, a house-elf who warns him of a peril that will take shape if he returns to Hogwarts. Dobby reveals that he intercepted his friends’ letters, and destroys a cake in order to prevent his return to school. The Dursleys lock Harry up, but Ron Weasley and his older twin brothers, Fred and George, rescue him in their father’s flying car.
While purchasing school supplies, Harry and the Weasley family encounter Rubeus Hagrid and Hermione Granger. They attend a book-signing by celebrity wizard Gilderoy Lockhart, who announces that he will be the new Defence Against the Dark Arts teacher. During a small confrontation with Draco Malfoy, Harry meets Malfoy’s father, Lucius, who discreetly slips a book into Ginny Weasley’s belongings, which only Harry sees, but he mentions this to no one. When Harry and Ron are blocked from entering Platform Nine and Three-Quarters, they fly to Hogwarts in the flying car. They crash into the Whomping Willow upon arrival, and Ron’s wand is damaged. Both boys narrowly avoid expulsion when Professor McGonagall gives them detention.
During the detention, Harry hears strange voices and later finds caretaker Argus Filch’s cat, Mrs. Norris, petrified, along with a message written in blood announcing the “Chamber of Secrets has been opened”. McGonagall explains that one of Hogwarts’ founders, Salazar Slytherin, supposedly constructed a secret Chamber. He placed a monster inside that only his Heir can control, capable of purging the school of impure-blooded wizards and witches. Harry and Ron suspect Malfoy as the Heir, so Hermione suggests they question him while disguised using polyjuice potion. They utilise a disused bathroom haunted by a ghost, Moaning Myrtle, as their makeshift laboratory to brew the potion.