The novel starts with Harry seeing Frank Bryce being killed by Voldemort in a vision. He awakes from the pain coming from his scar. The next day the Weasleys take Harry and Hermione to the Quidditch World Cup, using a Portkey. There, Harry meets Cedric Diggory, who attends the game with his father, Amos. After the match, the Death Eaters, Voldemort’s followers, attack the site, causing havoc. The Dark Mark gets fired into the sky, which causes panic since it’s the first time it has been seen in over thirteen years. Winky, Barty Crouch Sr’s house elf, is blamed for casting the Mark after she is found holding Harry’s wand, which was used to cast the Mark.
The trio returns to Hogwarts, where Alastor “Mad-Eye” Moody will be teaching Defense Against the Dark Arts. Albus Dumbledore announces that Hogwarts will host the Triwizard Tournament, only open to students over the age of seventeen, and the prize for winning the tournament is of one thousand gold Galleons. It is the first time in two hundred years that the Tournament will be held. Students from Beauxbatons Academy and Durmstrang Institute, traveled to Hogwarts and stayed the entire year during the completion.
Students who hope to participate must place their name in the Goblet of Fire. On Halloween night, the Goblet picks Fleur Delacour, Viktor Krum and Cedric Diggory, representing Beauxbatons, Durmstrang, and Hogwarts. The Goblet also gives a fourth name, Harry Potter, causing controversy and suspicion since Harry is underage. Ron refuses to speak to Harry because he is jealous that Harry is once again in the spotlight.
Hagrid tells Harry that the first task involves dragons, and Fleur and Viktor knows about it. Harry tells Cedric of this information. The first task, Harry has to pass a Hungarian Horntail to retrieve a golden egg, containing a hint about the next task. Harry succeeds by summoning his Firebolt broomstick with the Summoning Spell, and finishes the task tying for first place with Viktor. Ron reconciles with Harry after realizing the dangers of the Tournament. When Harry opens the egg, it shrieks loudly.
Meanwhile, a reporter called Rita Skeeter is writing scandalous articles and false rumors in the Daily Prophet about Hogwarts, Hermione, Harry, Hagrid, and the Headmistress of Beauxbatons.
The Yule Ball is approaching and Harry has to bring a date, he approaches to his crush Cho Chang, but she informs him that Cedric had already asked her. Harry eventually asked Parvati Patil and Ron took her sister Padma. During the Yule Ball, Ron is shocked and jealous to see that Hermione is attending the Ball with Viktor Krum. Cedric tells Harry that to open the egg, he needs to take it to the prefects’ bathroom. Harry ignores him due to his jealousy over Cho Chang.
However, Harry takes the egg to the prefects’ bathroom, where Moaning Myrtle tells him that he needs to hear it underwater. He realizes that the next task will take place underwater, so he began looking for spells which could allow him to breathe underwater.
By the morning of the task, Harry hasn’t found a spell, but Dobby gives him Gillyweed, which have Harry gills. The third task took place in the Black Lake and it involved saving the person each person cares about the most. Underwater, Harry looks at Ron and Hermione, unsure which one he is supposed to pick. Viktor takes Hermione to the surface. He completes the task finishing in third place by rescuing Ron from under the lake and saving Gabrielle, Fleur’s sister. After the judges tallied the votes they awarded him second place, giving him more points for saving Gabrielle.
One month before the final task, Harry and Krum are talking when they encounter Barty Crouch Sr, who looks to have gone insane, but tells Harry to get Dumbledore. Harry went to look for Dumbledore, leaving Viktor with Barty. When they return they found Viktor stunned and Barty missing.
Harry prepares for the final task, a hedge maze. Inside the maze, Harry is forced to incapacitate Viktor, who had been bewitched in order to save Cedric. They both agree to win the Tournament together by grabbing the Cup at the same time. When they grab it they discover that it is a Portkey that transports them to a graveyard. There, Peter Pettigrew kills Cedric, uses Harry’s blood, Tom Riddle Sr’s bone and his own arm to resurrect Lord Voldemort.
Voldemort summons his Death Eaters, berating them for thinking that he was dead. He then says that he only had one faithful servant at Hogwarts, who made sure that Harry would make it to the graveyard, he then challenges Harry to the duel. During the duel, Harry and Voldemort’s wands connect due to their identical cores. Voldemort’s wand releases the most recent spells preformed, resulting the appearances of the ghost of his victims, including Harry’s parents. Harry’s parents provided him a distraction so he could escape back to Hogwarts using the Portkey, taking Cedric’s body with him.
When he returns, Mad-Eye Moody takes him to his office where he reveals himself to be Voldemort’s servant. He admits to placing Harry’s name in the Goblet of Fire and helping him through the tournament ensuring his win. Before he can kill Harry, Dumbledore, Professor McGonagall, and Severus Snape intervene. They learn that Moody is Barty Crouch Kr, disguised using Polyjuice Potion.
We learn that Crouch Jr was sentenced to Azkaban by his father over his allegiance to the Dark Mark, but smuggled him out as a favor to his dying wife. Crouch Jr, was the one who stole Harry’s wand and cast the Dark Mark at the Quidditch World, in order to scare Voldemort’s former followers. Eventually, Voldemort got into contact with him and had him impersonate Moody. He also admits to killing his father, to prevent him from telling Dumbledore about Voldemort. The real Alastor Moody is found inside Crouch Jr.’s enchanted trunk. Many people, including Cornelius Fudge, the Minister of Magic do not believe Harry and Dumbledore about Voldemort’s return. He performs the Dementor’s Kiss to Crouch Jr. Hermione discovers that Rita Skeeter is an unregistered Animagus, who took the form of a beetle, and blackmails her.
Harry is declared the winner of the Triwizard Tournament and gives all his winnings to Fred and George, who started their own joke shop. Harry returns home with the Dursleys.