Harry and Dumbledore discover that Voldemort made seven Horcruxes - everyday objects that contain pieces of Voldemort's soul. Two have been destroyed, Tom Riddle's diary and a ring formerly owned by Voldemort. Harry and Dumbledore find a third - a locket in a cave. As they return to the castle, Malfoy appears and disarms Dumbledore. He tries to kill him but can't do it. Snape then appears and kills Dumbledore himself. He escapes along with Malfoy and the other Death Eaters. Harry opens the locket to find a note saying that the Horcrux is a fake, replaced by R.A.B.