Neville's [[Muggles' Guide to Harry Potter/Characters/Augusta Longbottom|grandmother]] sends him a [[Muggles' Guide to Harry Potter/Magic/Remembrall|Remembrall]], prompting [[Muggles' Guide to Harry Potter/Characters/Draco Malfoy|Draco]] to try and take it from him. Harry and Ron rise to his defence, and [[Muggles' Guide to Harry Potter/Characters/Minerva McGonagall|Professor McGonagall]] also appears. Draco, outnumbered, departs.
Gryffindor and Slytherin houses have flying lessons with [[Muggles' Guide to Harry Potter/Characters/Rolanda Hooch|Madam Hooch]]. Neville, unable to control his [[Muggles' Guide to Harry Potter/Magic/Brooms|broomstick]], falls off and fractures his wrist and is taken to the infirmary. Draco spots his dropped Remembrall, and
intends to hide it in a tree ; Harry chases him, and when Draco throws the Remembrall, Harry catches it before it hits the ground. Professor McGonagall, witnessing this, recruits Harry for the Gryffindor [[Muggles' Guide to Harry Potter/Major Events/Quidditch|Quidditch]] team.
, accompanied by Ron and Hermione, returns to Gryffindor Tower from a late-night Wizards Duel with Draco that he never showed for. [[Muggles' Guide to Harry Potter/Characters/The Fat Lady| The Fat Lady]] is away from her portrait , however, and they are locked out. Neville is sleeping in the hall because he forgot the password. The four head back to the Trophy Room, but [[Muggles' Guide to Harry Potter/Characters/Argus Filch|Argus Filch]] is approaching. Neville crashes into a suit of armour, but they elude Filch and [[Muggles' Guide to Harry Potter/Characters/Peeves|Peeves]], only to find themselves in a room with an enormous, three-headed dog. They escape and return to Gryffindor Tower.
Some time later, Neville enters the Gryffindor common room with his legs immobilized by Draco's [[Muggles' Guide to Harry Potter/Magic/Locomotor Mortis|Leg-locker jinx]]. Hermione frees him, and Harry gives Neville a Chocolate Frog. Neville returns the [[Muggles' Guide to Harry Potter/Characters/Albus Dumbledore|Dumbledore]] collector card inside the package to Harry. The card provides Harry an important clue about
Nicholas Flamel and the Philosopher's Stone that Harry believes Snape is trying to steal for Voldemort.
Draco uncovers the plan for [[Muggles' Guide to Harry Potter/Characters/Charlie Weasley|Charlie Weasley's]] friends to take Hagrid's baby dragon, Norbert, to Romania. Neville
overheard Draco boasting that he will catch Harry and Hermione in the act, and goes to warn them, but Professor McGonagall catches him being out after hours. Harry and Hermione are intercepted by Filch and brought before McGonagall, along with Neville. She assumes the three students were conspiring to get Draco in trouble and penalizes each fifty house points and gives them a detention. Draco is also penalized.
Detention is served with Hagrid in the [[Muggles' Guide to Harry Potter/Places/Forbidden Forest|Forbidden Forest]]. Something has been injuring and killing [[Muggles' Guide to Harry Potter/Magic/Unicorn|Unicorns]], and the four students are tracking an injured one. Draco and Neville initially are teamed together, but Draco deliberately scares Neville. Hagrid then re-shuffles the groups, pairing Harry with Draco.
When Neville discovers the Trio's plan to prevent the Philosopher's Stone from being stolen and given to
[[Muggles' Guide to Harry Potter/Characters/Lord Voldemort |Voldemort]], he attempts to intervene, saying they have already lost Gryffindor enough House points. Hermione reluctantly [[Muggles' Guide to Harry Potter/Magic/Petrificus Totalis|immobilizes Neville]].
At the Leaving Feast, Dumbledore awards Neville ten House points for having the courage to stand up to his friends. This is the first time Neville has won any points for anything, and it wins Gryffindor the House Cup.