Harry Potter's summer has included the worst birthday ever, doomy warnings from a house-elf called Dobby, and rescue from the Dursleys by his friend Ron Weasley in a magical flying car! Back at Hogwarts School of Witchcraft and Wizardry for his second year. For twelve long years, the dread fortress of Azkaban held an infamous prisoner named Sirius Black. Convicted of killing thirteen people with a single curse, he was said to be the heir apparent to the Dark Lord, Voldemort.
Now he has escaped, leaving only two clues as to where he might be headed: Harry Potter's defeat of You-Know-Who was Black's downfall as well. The Triwizard Tournament is to be held at Hogwarts. Only wizards who are over seventeen are allowed to enter - but that doesn't stop Harry dreaming that he will win the competition. Then at Hallowe'en, when the Goblet of Fire makes its selection, Harry is amazed to find his name is one of those that the magical cup picks out. Dark times have come to Hogwarts.
After the Dementors' attack on his cousin Dudley, Harry Potter knows that Voldemort will stop at nothing to find him. There are many who deny the Dark Lord's return, but Harry is not alone: a secret order gathers at Grimmauld Place to fight against the Dark forces. The war against Voldemort is not going well; even the Muggles have been affected. Dumbledore is absent from Hogwarts for long stretches of time, and the Order of the Phoenix has already suffered losses. As with all wars, life goes on.
Sixth-year students learn to Apparate. As he climbs into the sidecar of Hagrid's motorbike and takes to the skies, leaving Privet Drive for the last time, Harry Potter knows that Lord Voldemort and the Death Eaters are not far behind.
The protective charm that has kept Harry safe until now is now broken, but he cannot keep hiding.