This is a summary based on my understanding of the novel. Please also note that this summary contains spoilers. You may want to read the entire book first before proceeding - click this link to purchase via amazon.
Harry Potter and the Goblet of Fire by JK Rowling – Novel Summary
Harry Potter had a dream about Voldemort, Wormtail and a man, and he woke up with his scar burning – he told Sirius about that.
There will be an upcoming World Quidditch Cup and the Weasleys invited Harry. They fetched him at the Dursleys. During the world cup, a dark mark was conjured and Barty Crouch’s house elf, Winky, was blamed. Barty Crouch is Percy Weasley‘s boss.
When they all went back to Hogwarts, Dumbledore announced that there will be no Quidditch competition among the houses, but there will be a Triwizard tournament, Hogwarts vs. Beauxbatons and Durmstrang. The older students are allowed to join. They just need to put their name in the goblet of fire. For Beauxbaxton and Durmstrang, their representatives are Viktor Krum and Fleur Delacour. For Hogwarts, it is Cedric Diggory, but there was a fourth one, Harry Potter. Almost everyone believed that he put his name in the goblet and tricked Dumbledore. Even Ron was angry at him.
First task was to get the golden egg. He flew with the firebolt. He was assisted by Hagrid and Hermione. He ranked 2nd.
Second task – Mermaid. He was assisted by Dobby. He ranked 1st.
Third task – Maze. It’s a tie between him and Cedric.
During the third task, Cedric and Harry both reached the cup and they argued about who should take it. So they decided to touch it at the same time. When they touched the cup, they were transported somewhere where they found Wormtail. An ‘Avada Kedavra’ was performed to Cedric Diggory and he died. Harry was tied by Wormtail, as he watched Voldermort’s rebirth. When Voldemort stepped out of the Cauldron with a body, he summoned the Death Eaters and asked Harry for a duel. He and Harry fought, but instead of hurting each other, their wands made a connection. Something unusual happened – ghosts/souls started emerging from Voldemort’s wand. First, Cedric, then Bertha Jorkins, an old man, James Potter and Lily Potter. They urged him and told him to run. Cedric asked him to take his body back to his parents. He ran, summoned the cup and went back to Hogwarts where everyone was worried about him. Harry was guided by Madeye Moody (Dark Arts teacher) and then when they were both alone, Moody told him that he was the one who placed Harry’s name in the Goblet of Fire and he was the one Voldemort referred as his faithful servant in Hogwarts.
The real Madeye Moody was hidden and Mr. Crouch’s son kept on drinking Polyjuice Potion to pretend that he was Madeye Moody. Barty was sent to Azkaban because he was caught as a supporter of Voldemort, he died a year after. (It was his mother that died. Both of them drank polyjuice potion, his mother pretended to be him and was the one who stalled in prison). Bertha Jorkins knew about Barty and Voldemort knew from her that Barty was looking for Voldemort to help him. It was also him who conjured the dark dark. He killed his father because he was about to tell Dumbledore about Voldemort’s return. It was Barty (in the form of Moody) who convinced Hagrid to show Harry the dragon so he wins, he also gave a hint about the second task to Harry by giving Neville a book but then that failed so he staged a convo about the second task where Dobby helped. On the third task, he also made sure Harry wins so he’d touch the cup first which he turned into a portkey.
Barty was given the Dementor’s kiss.
Harry was announced as the winner with 1k Galleons. He gave the prize to Fred and George Weasley so they could start a joke shop.