Harry Potter and the Goblet of Fire

In 1994, Harry Potter has a nightmare in which a Muggle caretaker named Frank Bryce is murdered at the Riddle House after overhearing a plot by Lord Voldemort, Peter Pettigrew, and another man whom Harry does not recognise. The following morning, Harry attends the Quidditch World Cup with the Weasleys, Hermione Granger, Cedric Diggory and his father Amos. That night, Death Eaters attack the campsite after the tournament and the unknown man from Harry's nightmare casts the Dark Mark.
At Hogwarts, Professor Dumbledore announces that the school will host the Triwizard Tournament along with the Durmstrang Institute and the Beauxbatons Academy. One student from each school will be chosen by the Goblet of Fire to participate; students under the age of seventeen are ineligible. The Goblet selects Fleur Delacour for Beauxbatons, Viktor Krum for Durmstrang, and Cedric for Hogwarts. It then chooses Harry as a fourth Champion, leading to much confusion. Many students believe Harry cheated, and Ron distances himself from him, hurt that Harry did not tell him when he allegedly entered. Harry is forced to compete due to a magical binding contract when a Champion's name was selected.
For the first task, the Champions must retrieve an egg by getting past a dragon. Professor Alastor Moody, the new Defence Against the Dark Arts teacher, hints that Harry can use his wand to summon his broomstick. All four Champions collect their eggs. Ron reconciles with Harry after witnessing how perilous the first task was. On Christmas Eve, the school hosts the Yule Ball, but Harry and Ron could not attend with their preferred dates and instead go with Parvati and Padma Patil, respectively; Hermione goes with Viktor, provoking Ron's jealousy. Cedric advises Harry to use the Prefects' bathroom on the fifth floor of Hogwarts, take a bath, and submerge the egg in the water to find the second clue.
For the second task, the Champions must rescue somebody of value to them from the Black Lake: Harry has to save Ron, Cedric has to save his girlfriend, Cho Chang, Viktor has to rescue Hermione, and Fleur has to save her sister, Gabrielle. Neville Longbottom gives Harry gillyweed to help him breathe underwater. Cedric comes in first, and Harry is awarded second place after he saves not only Ron, but also Gabrielle, after Fleur had withdrawn from the task.
Harry later finds the lifeless body of Bartemius Crouch, a Ministry of Magic official, in the Forbidden Forest. In Dumbledore's office, he enters a Pensieve. He witnesses the questioning of Igor Karkaroff, current headmaster of Durmstrang, by Bartemius Crouch. Karkaroff is asked to name those who served Voldemort. He names Severus Snape, but Dumbledore vouches for Snape. Karkaroff then names Barty Crouch Jr. Harry recognises Barty Jr. from his nightmare.
For the third task, the Champions must navigate a maze to reach the Triwizard Cup. Harry and Cedric reach the Cup only to discover it is a Portkey that transports them to the graveyard from Harry's dream. Pettigrew kills Cedric on Voldemort's orders. He then uses Harry's blood to fully restore Voldemort. Lucius Malfoy and the Death Eaters arrive and are punished by Voldemort, while Pettigrew is rewarded. Voldemort tortures Harry and attempts to use the Killing Curse on him but as it clashes with Harry's spell, the ghosts of Voldemort's previous victims: Cedric, Frank, and Harry's parents Lily and James appear, distracting Voldemort long enough for Harry to use the Cup to return to Hogwarts with Cedric's body.
Harry informs Dumbledore of Cedric's murder and Voldemort's return. Harry is escorted by Moody to his office where he learns that Moody put his name into the Goblet and was guiding him to ensure the return of Voldemort. Just as Moody is about to kill Harry, Dumbledore, Snape, and Minerva McGonagall subdue Moody. Using Veritaserum, they learn that they have caught Barty Crouch Jr., who was impersonating Moody using Polyjuice Potion; the real Moody is imprisoned in a magical trunk.
At a memorial ceremony, Dumbledore announces that Voldemort murdered Cedric, although the Ministry denies these claims. Harry informs Dumbledore of his encounter with Voldemort, which Dumbledore describes as Priori Incantatem. The three schools bid farewell, with Harry, Ron, and Hermione agreeing that everything will change.