Harry Potter and the Half-Blood Prince is a 2009 fantasy film directed by David Yates and distributed by Warner Bros. Pictures.It is based on J. K. Rowling’s 2005 novel of the same name. The film, which is the sixth instalment in the Harry Potter film series, was written by Steve Kloves and produced by David Heyman and David Barron. The story follows Harry Potter’s sixth year at Hogwarts as he receives a mysterious textbook, falls in love, and attempts to retrieve a memory that holds the key to Lord Voldemort’s downfall.
Lord Voldemort is tightening his grip on both the wizarding and Muggle worlds, kidnapping Ollivander from Diagon Alley and destroying the Millennium Bridge. The Malfoy family is disgraced when Lucius is apprehended and sent to Azkaban for his involvement with the Death Eaters. Voldemort instead chooses Draco to carry out a secret mission at Hogwarts. Draco’s mother Narcissa and aunt Bellatrix Lestrange seek help from Severus Snape, who claims to have been acting as a mole within the Order of the Phoenix all along. Snape makes an Unbreakable Vow with Narcissa to protect Draco and fulfill the assignment if he fails.
Harry Potter, now 16 years old, accompanies Albus Dumbledore from Surbiton to the village of Budleigh Babberton to visit former Potions professor Horace Slughorn. Slughorn, who has been in hiding, agrees to return to teach at Hogwarts. Dumbledore then takes Harry to The Burrow, where Harry reunites with his best friends, Ron Weasley and Hermione Granger. The three visit Fred and George Weasley’s new joke shop at Diagon Alley and see Draco entering Knockturn Alley with a group of Death Eaters including Fenrir Greyback. Harry believes Voldemort has made Draco a Death Eater, but Ron and Hermione are sceptical. On the Hogwarts Express, Harry hides in the Slytherin carriage using his Invisibility Cloak, but is spotted and petrified by Malfoy. Harry is found and saved by Luna Lovegood.
At Hogwarts, Harry and Ron borrow textbooks for Slughorn’s Potions class, and Harry is stuck with a copy that turns out to be filled with helpful notes and spells left by the “Half-Blood Prince”. Harry uses the book to excel in the class and impresses Slughorn, winning a Liquid Luck potion. Ron becomes Keeper of the Gryffindor Quidditch team and forms a romantic relationship with Lavender Brown, upsetting Hermione. Harry consoles Hermione and admits that he now has feelings for Ron’s younger sister, Ginny Weasley.