Summary 1:
Harry Potter is the most miserable, lonely boy you can imagine. He’s shunned by his relatives, the Dursley’s, that have raised him since he was an infant. He’s forced to live in the cupboard under the stairs, forced to wear his cousin Dudley’s hand-me-down clothes, and forced to go to his neighbour’s house when the rest of the family is doing something fun. Yes, he’s just about as miserable as you can get.

Harry’s world gets turned upside down on his 11th birthday, however. A giant, Hagrid, informs Harry that he’s really a wizard, and will soon be attending Hogwarts School of Witchcraft and Wizardry. Harry also learns that, in the wizarding world, he’s a hero. When he was an infant, the evil Lord Voldemort killed his parents and then tried to kill Harry too. What’s so amazing to everyone is that Harry survived, and allegedly destroyed Voldemort in the process.

When Harry hears all this, he doesn’t know what to think. However, everything Hagrid tells him turns out to be true, and with a joyful heart Harry starts wizarding school in September. He quickly becomes best friends with a boy named Ron Weasley, and before they even make it to Christmas, they break tons of school rules when they attack a troll and prevent it from killing fellow student Hermione Granger. After the troll incident, the three become inseparable, and Harry is amazed to have found such great friends. He is constantly busy trying to stay on top of the mounds of homework, as well as participating in weekly Quidditch practices. Quidditch is a popular sport among wizards and Harry is the youngest Quidditch player in over a century. It's also a game Harry loves more than anything else at school.

As the year progresses, the three friends set out to solve the mystery of the gigantic three-headed dog that is guarding something in a deserted corridor in the school. They figure out that a very valuable object, the Sorcerer’s Stone, is being hidden in the school, although they don’t know why. When one of the professors starts acting as if he’s trying to steal it, they quickly take action to circumvent the theft.

Things come to a head when they sneak past the vicious, three-headed dog and go down into the bowels of the school, determined to save the stone. Ron and Hermione help Harry get through the challenges set forth to stop the thief, but Harry must go on alone to battle the professor. When he finally gets to the last room, however, he’s astonished to find someone else entirely.

Harry is forced to do battle with the wizard that tried to kill him so many years before, Lord Voldemort. He’s able to save the Sorcerer’s Stone, although he’s almost killed in process. The school headmaster, Dumbledore, arrives just in time to save Harry.

The school year ends spectacularly. Harry, Ron, and Hermione are honored for their service to the school, and Harry leaves to go back to the Dursley’s for the summer feeling as if he’s finally found a place where he really belongs.
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Summary 2:
The story begins with a description of the Dursleys, an utterly normal family in England, who are left with baby Harry Potter on their doorsteps. Aunt Petunia's sister Lily married James Potter and became a powerful couple in the wizard's world. They were killed by the evil Voldemort, leaving Harry with a large scar on his forehead and legacy as the only wizard to escape Voldemort alive. Head wizard Albus Dumbledore decides to have Harry grow up with the Dursleys until he is ready to attend Hogwarts, the premiere magic school in England. At age 11, Harry is whisked away to Hogwarts by the giant gamekeeper, Hagrid, to find himself lost amongst a new world of magic and power.

Hagrid takes Harry to Diagon Alley, where he retrieves some of his inheritance from Gringotts, the wizard bank, and purchases his books, wand, and robes from the Leaky Cauldron and Ollivanders. On the train toHogwarts at platform Nine and Three Quarters, Harry meets his new friend Ron Weasley and Hermione Granger. Everyone is amazed to meet the famous Harry Potter. On the train Harry also meets Draco Malfoy, a boy with whom he develops a distrust and hatred. At Hogwarts, the children meet Dumbledore, McGonagall, Snape, and Quirrell, all professors and wizards. At the opening banquet, the Sorting Hat decides in which house the children live, sorting Hermione, Neville, Ron, and Harry into Gryffindor, andDraco Malfoy into Slytherin, the house run by Snape and known to have schooled Voldemort in years past.

Hermione busies herself with studies, Ron with chess, and Harry with learning about his family and powers. He becomes an expert at flying and is allowed to play Quidditch for Gryffindor's team.Draco Malfoy continually tries to get the Gryffindor kids in trouble, by setting them up and dragging them away from their beds at the wrong time. One day, Ron and Harry come across a large troll and rescue Hermione from death. From then on, the threesome spies on Snape and Quirrell and seek to discover the secrets atHogwarts. They realize that the Sorceror's Stone is hidden by a three-headed dog at Hogwarts and is the secret to eternal life created by Nicholas Flamel. They believe Snape is the culprit behind the evil and try to stop him from destroying Harry andHogwarts.

Meanwhile, Hagrid keeps an eye on Harry and looks out for him. They visit Hagrid and meet his new pet dragon, Norbert. Norbert causes problems for everyone, as dragons are illegal animals. The three send the dragon away to Romania under Harry's Invisibility Cloak and are discovered out of bed doing so. They are branded and punished with detention and stricken of fifty points each. As detention the kids must help clean up the Forbidden Forest with Hagrid. They find a unicorn slaughtered, with its blood scattered across the ground, and are frightened by an evil spirit. The good centaur Firenze flies Harry away from danger in the forest as soon as he discovers who Harry is.

Harry, Ron, and Hermione discover that Voldemort tricked Hagrid into revealing the method by which to get past the three-headed dog and to the Sorcerer's Stone. They rush past the dog, and through the chambers to stop Voldemort from killing Harry. Ron gets everyone past the life sized Wizard's Chess board, while Hermione breaks the riddle that allows Harry to proceed to the ultimate chamber under ground. He sees the Mirror of Erised, the same mirror that shows the hopes and dreams of the person who looks inside. He finds Quirrell in the chamber without his stutter. He admits to hosting Voldemort and trying to destroy Harry in the forest. When his turban is removed, Harry sees a double face on top of Quirrell's head - it is Voldemort, and he wants to use Harry to get the Stone and then kill him. Harry discovers the Stone in his pocket and tries to kill Voldemort/Quirrel until he blacks out.

Harry awakens in the infirmary to Dumbledore congratulating him. He saved the Stone, Hogwarts, and his own life. Because of his bravery and that of Hermione, Ron, and Neville, Gryffindor wins the House Cup for the year. Harry must go back to the Dursleys for the summer, but looks forward to all the magic he will practice and learn in the future.