Who Is Draco Malfoy?

Lord Voldemort is tightening his grip on both the wizarding and Muggle worlds and has chosen Draco Malfoy to carry out a secret mission: to kill Albus Dumbledore. Severus Snape makes an Unbreakable Vow with Draco's mother, Narcissa, to protect Draco and fulfil the assignment if he fails.

16-year-old Harry Potter finds Dumbledore to visit former Potions professor Horace Slughorn, who has gone into hiding. Slughorn agrees to return to teach at Hogwarts. Dumbledore then takes Harry to the Burrow, where Harry is once again reunited with his best friends Ron Weasley and Hermione Granger, as well as Ron's younger sister Ginny Weasley. Harry believes Voldemort has made Draco a Death Eater, but Ron and Hermione are sceptical. On the Hogwarts Express,

After Draco is gone, Harry's close friend, Luna Lovegood rescues him with the Finite spell, thus breaking Draco's curse; She was able to find him due to his head being full of Wrackspurts and they walk up to the school and Harry is reunited with his friends again.

Dumbledore lets Draco disarm him of the Elder Wand (Thus causing the Headmaster losing mastership of the wand to Draco) and tries to kill the Headmaster; However, he is unable to bring himself to do it, and Snape soon arrives underneath, telling Harry to be quiet, goes upstairs and he casts the Avada Kedavra curse instead, killing Dumbledore and blasting him off the Astronomy Tower as Bellatrix conjures the Dark Mark into the sky. Harry attempts to curse Snape but Snape overpowers him and reveals that he is the Half-Blood Prince. Harry returns to the school along with Hagrid to find the staff and students mourning Dumbledore as they stare at his corpse. Harry walks up to the body and strokes Dumbledore's hair, takes the locket they had recovered and puts his hand on Dumbledore's heart as Ginny sits beside Harry and comforts him as he cries. Hermione starts crying and soon McGonagall and soon Luna, Ron, Madam Pomfrey and everyone else (except Harry and Ginny) raise their wands into the sky and make the Dark Mark in the sky disappear. Harry later reveals to Ron and Hermione that the locket Horcrux was a fake. The locket contains a message from "R.A.B.", stating that he has stolen the real Horcrux with the intent of destroying it. Rather than return for their final year at Hogwarts, Harry, Ron and Hermione vow to seek out and destroy the remaining Horcruxes in