After Harry Potter studied at Hogwarts School of Witchcraft and Wizardry for a year, the summer vacation began. He spent a painful holiday at his uncle's house. Just as he was preparing to pack his bags for school, Dobby, the house elf, came to warn that if Harry returned to Hogwarts, disaster would befall him. Dobby set many obstacles for Harry to return to Hogwarts, but Harry and Ron drove Mr. Weasley's flying Ford classic car and returned to Hogwarts without hesitation ... Just after the school started, something strange happened in the magic school: the janitor's cat and several students were petrified by some terrible force, and "The Chamber of Secrets was opened ..." It was written in blood at the scene. In order to strengthen the students' awareness of prevention, Professor Lockhart and Professor Snape organized a "magic duel" during the exercise. Harry inadvertently said "snake language" to prevent Malfoy's snake from attacking his classmates, but this move caused an uproar, because even in the wizard world, speaking snake language, the so-called "snake guy's voice", is not welcome, because it is Slytherin's special ability and Voldemort's language, and everyone. At the same time, several students who spoke ill of Harry fossilized, which made everyone's panic worse. At Hogwarts, there is an old legend. At that time, the four founders of Hogwarts had very different opinions on enrollment. Slytherin believes that only pure-blood wizards with the purest blood are eligible to enter his college. Slytherin set up a secret room in a place at Hogwarts. It is said that only the heir of Slytherin can open the Chamber of Secrets. No one knows where this secret room is, but 50 years ago, the secret room was opened and a student (crying Myrtle) died. Faced with more and more victims, there is a panic in the school. The school even announced that it might close. Harry, Hermione and Ron are determined to find out the secret of the Chamber of Secrets. They suspect Malfoy did all this. They made polyjuice potion look like Crabbe and Goyle, trying to get words out of Malfoy. However, even Malfoy doesn't know who is the heir of Slytherin, let alone open the Chamber of Secrets. Harry came across a diary in the girls' bathroom, where they usually prepare decoction. Although it looks shabby, there is not a word in it. Harry took his diary with him and was surprised to find that it can think for himself and communicate with others. The owner of the diary is called "tom riddle", who used to be a student at Hogwarts. He showed Harry a memory. Harry found that 50 years ago, it seems that Hagrid opened the secret room, released the monster and killed a student. Harry went to ask Hagrid for evidence, and Hagrid denied ever opening the Chamber of Secrets. Just then, officials from the Ministry of Magic came to arrest Hagrid, who was taken to Azkaban, and Dumbledore was forced to be dismissed as the headmaster of Hogwarts. Before Hagrid left, he left a clue for Harry: "Follow the spider and you will get the clue." In order to solve a series of horrible mysteries, Harry must explore the mysterious chamber of secrets, and the fatal crisis is approaching step by step ... After a Quidditch game, Harry and Ron are told that Hermione has also been petrified. The two men were heartbroken and strengthened their determination to find out the secret of the Chamber of Secrets. But everything had no clue. Just when they had no clue, Harry found the spider. They followed the spider to the depths of the forbidden forest. Deep in the forbidden forest lives a huge spider colony. Aragog, the leader of this group, was once a friend of Hagrid's. Aragog confirmed that Hagrid didn't open the Chamber of Secrets, but someone else did. Just as the spider headed by Aragog tried to attack Harry and Ron, Mr Weasley's flying Ford came and saved their lives. When Harry and Ron went to visit Hermione who was petrified, they accidentally found Hermione holding a piece of paper torn from a library book, which read "basilisk" and "tube". Harry suddenly realized that the voice he heard was the voice of the basilisk. Because he is a person who likes snakes, only he can hear and no one else can hear. The sound has been moving because the basilisk has been hiding in the sewer of the castle and moving. And the female student who died 50 years ago, if she has never left the place where she died, then she is the ghost "crying myrtle" in the girls' bathroom. Harry ran to the crying Myrtle and made sure that the crying Myrtle told him about the last time he opened the Chamber of Secrets. She was killed immediately because she looked at the basilisk. People who see basilisk eyes through reflective things will be petrified. Just then, the bad news came again. Ron's sister Ginny was robbed by the basilisk. Ron and Harry decided to save Ginny at once. They forced Professor Lockhart to accompany them through Myrtle's bathroom. Harry used snake language to open the passage to the secret room and entered it. In the passage leading to the Chamber of Secrets, Professor Lockhart intends to forget the curse on Harry and Rawlings. Unexpectedly, Ron's bad wand cast this evil spell on Professor Lockhart, and Professor Lockhart lost his memory. At the same time, the power of the evil spell caused the passage to collapse, and Harry had to go alone. In the secret room, Harry met tom riddle, only to know that he was Voldemort in his youth. When studying at Hogwarts, Voldemort once opened the Chamber of Secrets and released the basilisk. Now, part of his memory is kept in his diary. Ginny got the diary and confided her thoughts to him. So Voldemort took control of Ginny, let her open the Chamber of Secrets, let out the basilisk, and wrote on the wall "The Chamber of Secrets was opened ...". Voldemort asked the basilisk to attack Harry. At the critical moment, Fox appeared and brought sorting hat to Harry. Harry drew Gryffindor's sword from sorting hat and killed the basilisk, but its fangs stabbed him in the arm. When he was dying, Fox flew in and healed the fatal wound on Harry's arm with his tears. Meanwhile, Voldemort is absorbing Ginny's vitality. Ginny is dying, Voldemort is getting stronger and stronger, Ginny is getting weaker and weaker. Harry had a brainwave and stabbed the fangs of the basilisk into his diary. Voldemort disappeared, Ginny woke up and they met Ron. Fox takes them out of the Chamber of Secrets and back to Hogwarts. The semester is coming to an end, and the Mandrake cultivated by Professor Sprout has matured, saving all the petrified students, and Hagrid has also been released. Harry's second year at Hogwarts ended in joy.