Harry Potter and the Chamber of Secrets (2002)

PLOT :
Harry Potter and the Chamber of Secrets begins as Harry spends a miserable summer with his only remaining family, the Dursleys. During a dinner party given by his aunt and uncle, Dobby, a house-elf pops into Harry's bedroom, warning Harry not to return to Hogwarts, telling him terrible things will happen if he does. Harry disregards the warning. Dobby wreaks havoc in the kitchen, infuriating the Dursleys, who angrily imprison Harry. Harry is rescued by his friend Ron Weasley and brothers Fred and George in their flying car, spending the summer at the Weasley home.

Harry accidentally ends up in Diagon Alley in dark-arts Knockturn Alley. Fortunately, Hagrid (who is buying flesh-eating slug repellent) guides him safely to Diagon Alley to shop for school supplies. In the company of the Weasleys, Harry encounters famous Gilderoy Lockhart, who informs everyone that he's the new Defense Against the Dark Arts teacher, and demands to be in a photo shoot with Harry. When Harry and Ron get to the train station, they inexplicably can't get through the secret entrance to Platform 9 ¾, so they decide to fly the Weasley's car to Hogwarts instead. Next day Molly Weasley sends a Howler to Ron, threatening to bring him home if puts a toe out of line.
Lockhart is an incompetent teacher, more concerned with personal accomplishment than teaching. On Halloween, the school caretaker's cat, Mrs. Norris, is petrified. On a wall "The Chamber of Secrets has been opened, enemies of heir beware" is found scrawled in blood. Harry, Ron and Hermione Granger discover that one of Hogwarts' founders, Salazar Slytherin secretly built the Chamber of Secrets, which is rumoured to contain a monster only Slytherin's heir can control.

Suspecting that Draco is the heir of Slytherin, the trio make Polyjuice Potion, a brew which allows them, for a period of time, to look like someone else. While playing Quidditch, Harry is pursued by a rogue Bludger. Harry's arm is broken. Lockhart volunteers to heal the broken bones, but melts them instead. That night, as Harry lies mending in his hospital bed, Dobby appears and admits responsibility for the platform incident and the rogue Bludger. Soon after, a first year student, Colin Creevy, is attacked and petrified.
During the first meeting of Lockhart's new dueling club, Harry unwittingly speaks Parseltongue which stops a snake from attacking a student. Harry's ability frightens everyone because Salazar Slytherin was also able to speak Parseltongue, and his heir would also have this ability. Harry comes under further suspicion when he stumbles upon the petrified bodies of Justin Finch-Fletchley and Nearly Headless Nick.
At Christmas, Harry and Ron use the finished Polyjuice Potion to disguise themselves as Draco's friends Crabbe and Goyle. Harry and Ron discover that Draco is not the heir of Slytherin, and that the Chamber was opened fifty years before. After a few quiet months, Harry finds a diary in a flooded bathroom. He writes in the diary, which responds in writing, showing Tom Riddle, a boy who fifty years before accused Hagrid, Hogwarts gamekeeper, of opening the Chamber of Secrets. Some time later, Harry's room is ransacked and the diary is taken.
Hermione and a Ravenclaw girl, Penelope Clearwater, are petrified. Harry and Ron intend to question Hagrid, but before they can, he is accused of opening the Chamber of Secrets again, and is sentenced to Azkaban prison. Before Hagrid is led away, he instructs the boys to "follow the spiders" into the Forbidden Forest. There they encounter Aragog who tells them the monster who killed the girl fifty years before was not a spider, that the girl's body was found in a bathroom, and that Hagrid is innocent. The boys escape a colony of giant spiders and realise that Moaning Myrtle, the ghost who haunts the bathroom where they made the Polyjuice Potion, must have been the girl Aragog is referring to.

The trio discovers the entrance to the Chamber in Myrtle's bathroom. Harry opens the chamber by speaking Parseltongue. Lockhart, brought along by the boys when caught trying to run away from Hogwarts, steals Ron's wand, and attempts a memory charm on them. Ron's broken wand deflects the spell back at Lockhart. Harry is forced to go on alone after a cave-in.
Harry finds Ginny's unconscious body, as well as the almost-physical form of Riddle. Riddle forced Ginny to enter the Chamber, and by possessing her soul, began to take physical form. Riddle reveals that Tom Marvolo Riddle is an anagram for I am Lord Voldemort.
Just when it seems Harry will be killed by the Basilisk, Fawkes, Dumbledore's pet phoenix, appears and blinds the Basilisk. Fawkes carries the school Sorting Hat, from which Harry draws a sword and kills the Basilisk, but one of its fangs pierces Harry's arm. Harry is saved by Fawkes, as phoenix tears have immense healing powers. Harry then stabs the diary with a Basilisk fang, defeating Riddle and saving Ginny.
The two then return with Ron and Lockhart to the school, where Ginny is reunited with her parents, and Harry and Ron are commended by Dumbledore. In the aftermath, Harry accuses school governor Lucius Malfoy (Draco's father) of putting the journal in Ginny's cauldron and later tricks him into freeing Dobby (who works for the Malfoys), earning him the elf's gratitude.
In the end, the petrified students are revived and Hagrid is freed. Hogwarts is saved and Harry returns to the Dursleys once again

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