- Over the summer, they write letters and make phone calls, and when Owling doesn't work they use the Muggle mailing system, and there are outings and everyone has a good time (they're kids, okay, they're allowed to just… be kids, and friendships are allowed to be easy.)
- Haven freaks out when she finds Dobby in her room after attending Vernon's business meeting - she's a part of the family, this time, and so she plays along, she acts the angel for Vernon (and he gets the deal, and they have a blast picking out that vacation home in Majorca) and then she gets a warning letter for underage magic (what is apparition, she wonders) when the House Elf leaves. By the time she's written to her friends and received letters back, she knows that Dobby belongs to Malfoy, and Hermione is on her House Elf Rights rampage.
-Haven spends the last month of vacation house hopping (with the Dursleys' permission) and generally having a good time with all her friends. She and Hermione go school shopping with the Weasleys, and witness the entire altercation between Mr Weasley and Malfoy Sr. Then she spends a few more days with her friends, and heads to Hogwarts with the Greengrass family (and they're not late, but it still closes, so the Greengrasses have them floo to the Headmaster's office. They make it with more than enough time for the Sorting.
- Not only is Lockhart a narcissistic twit, but Haven can't help but think he's justified. After all, he's superbly attractive, and Haven can't help but be infatuated with him - he's done so much in his life. Despite the boys' disapproval, Haven isn't the only one who thinks Lockhart is Merlin reincarnate. Of course, once Theo Nott (who has even better recall than Hermione) points out and proves to all the girls in their circle of friends that Lockhart is a fraud, Haven and everyone else loses their adoration for him in seconds. Despite that, they assume he has some talent, otherwise people wouldn't believe him. Right?
- Haven's practicing Quidditch with the Gryffindor team when Malloy and the Slytherins interrupt. Despite the older kids' attempts at intervention, Haven and Ron get detention for attacking Malfoy, and Malfoy gets detention for calling Hermione a Mudblood.
- Haven's detention is with Lockhart, and it goes pretty much as it did in canon, only Lockhart talks himself up to Haven. Ron is assigned to clean the trophy room under Filch's supervision. Malfoy has detention with Hagrid, feeding roosters and watering pumpkins and essentially doing other menial tasks that his father will certainly hear about.
- Haven does not attend the death day party, and instead attends the Halloween Feast. She learns of Mrs. Norris' situation at the same time as everyone else, and becomes convinced that Malfoy is the culprit when he sneers at all her Muggleborn friends while saying that Mudbloods will be next. Instead of celebrating Samhain, the Gryffindors spend the night discussing some of the legends of Hogwarts in the common room before having yet another sleepover.
- Dobby demonstrates his particular brand of unhelpfulness, Lockhart vanishes Haven's bones (resulting in everyone thinking he's an inept idiot), and Colin Creevey is petrified.
- Lockhart holds the duelling club, and Haven and co only go when they find out that Snape is also teaching. Even though Haven has her differences with Snape, they all want him to show Lockhart up, and enjoy it when he does. After, Lockhart pairs Malfoy and Ginny together (he chooses Malfoy first, and Ginny volunteers because she's even more reckless than Ron, who has mellowed since coming to Hogwarts, and she hates that Malfoy's father humiliated her father, and there's been bad blood between the Malfoys and Weasleys for decades, anyway), and Malfoy conjures his snake. Ginny freaks out (she's terrified that Malfoy knows what's going on, knows that she dreams of huge snakes, knows that her greatest fear is snakes) when the snake approaches her, and Haven rushes forward to distract it (Gryffindors protect their own) and subsequently reveals to everyone including herself that she is a Parselmouth (apparently wixen can't talk to snakes, who knew.)
- Of course, because Haven is far more social than in canon, and she doesn't tend to cause problems that people take issue with, she is not ostracized. Life goes on as normal. However, since Haven realises she's been hearing snakes in the walls, she's convinced that Malfoy is the Heir - summoning a snake in front of a huge group of people is a risky statement, after all; it is almost as risky as petrifying a cat and writing on the walls in blood. With this in mind, Haven decides that they should interrogate Malfoy, and asks her Slytherin friends who Malfoy is closest to in Slytherin. The answer turns out to be Crabbe and Goyle and Pansy Parkinson, and so Haven and her friends come up with a plan to talk to Malfoy (none of her Slytherin friends can ask because he'll know that they're onto him, so their best option is Polyjuice.) Percy and Cassius make the Polyjuice in the Room of Requirement, turning it into an impromptu Potions lesson for the younger years at the same time. They take the Polyjuice before Christmas break, and work out that it would be best to do it after breakfast, so that they can get into the Slytherin common room with little to no difficulty. Haven and Ron are accompanied by Neville, and do their best to interrogate Malfoy without seeming to be someone other than who they're pretending to be. At one point, when Malfoy insults Mr Weasley and Ron struggles not to react, it is Mafalda Weasley who calls him out and tells him to leave her uncle alone. Soon afterwards, and with evidence pointing away from Malfoy being the Heir, the three Gryffindors leave the Slytherin common room and release Crabbe, Goyle and Parkinson from their confinement.
- Everyone is encouraged to return home for Christmas, and Haven goes to the Dursleys', and writes to her friends over the break.
- Ginny drops the Diary on her way to breakfast one morning after Christmas break, and Haven comes across it. Ron recognizes the name from his trophy room cleaning, and they look through it together. They both learn about Hagrid's supposed involvement and go to talk to him about it, leaving the Diary behind.
- Hagrid tells them what he knows about the Heir of Slytherin (and spiders), making it clear that he's not the Heir. Ron and Haven hurry to class, and tell their friends their discoveries during lunch. Haven discovers that the Diary is missing, and Hermione comes to the conclusion that Tom Riddle's Diary is working with someone who has access to the Gryffindor common room. Hagrid is arrested and taken to a holding cell that same night.
- There is a Quidditch game the next day, and Hermione runs off to the library. She comes back just as the game begins, with a page of notes about basilisks that she shows to Percy and Cassius. Later that day, Hermione and Mafalda Weasley are petrified in the second floor girls' bathroom. After Percy and Cassius share Hermione's theory, Haven and her friends work to figure out how people are being petrified, and they visit each location to see what the commonality is.
- Another student is petrified, as is Professor Binns, resulting in the need for a new History Professor. Remus takes the post, but only for the rest of the year.
- No closer to discovering who the Heir is, Haven and co throw themselves into their school work, making sure to take extra good notes for Hermione, who is supposed to be unpetrified before exams. Only a couple of weeks later, the Heir attacks again, taking someone into the Chamber.
- Haven and her friends find out that it is Ginny who is missing. They overhear the Professors talking about sending Lockhart to find Ginny, and show up in his office, where they find him packing up. He spills everything, and Haven disarms him. Somewhere in the commotion, Lockhart's wand snaps, but he stupidly tries to use it to Obliviate them before they shove him into the Chamber. He manages to Obliviate himself, and so Haven has Ron go off to find one of their older friends for help, and plans to meet him in the Chamber. Haven becomes worried about Ginny, and goes down into the Chamber, leaving the doors open behind her. She manages to hold a lengthy conversation with Tom before he calls the basilisk, and Fawkes shows up with the sorting hat and has just blinded the basilisk when Ron appears with the upper year he went to find. The upper year successfully conjures a rooster just before Haven stabs the basilisk. As she fades, she manages to stab the Diary, and they all get out safely.
- Haven, Ginny, Ron and the upper year are escorted to Dumbledore's office by Fawkes, where they find the Weasleys, Aunt Petunia, and Lucius Malfoy. Mrs Weasley and Aunt Petunia team up together against Malfoy, and Petunia even yells at Dumbledore a bit for not making sure his students were safe.
- Everyone heads for the hospital wing, and through an interesting series of events, Dobby ends up getting freed, and agrees to join Hermione's House Elf Rights Campaign.
- In the hospital wing, arrangements are made for Ginny to visit a mind healer. Haven is cleaned up and examined to see if there will be any adverse effects from the basilisk poison and phoenix tears. Mafalda visits Ginny in the Hospital Wing, and everyone visits Haven while Madam Pomfrey keeps her to make sure she's okay.
- When Haven is released, Mandrake potions that have been ordered (Madam Pomfrey decided it would take too long for the Mandrakes to mature and decided to order pre-made potions) are used to unpetrify any students who were victim to the basilisk's mirrored stare.
- Gryffindor manages to win the House Cup and the Quidditch Cup, but there are no hard feelings because they've made progress.
- Haven asks Snape if there is such a thing as an ancestry potion because she knows that Voldemort is still alive, and wants to know if it would be possible to prove that he's a Half-blood, like Tom told her in the Chamber. He admits that there is not and decides to develop one. It ends up being a fifth year potion, but anyone older than fifth year is allowed to use it if they make it themselves. This potion provides information from decades back about a person's heritage, even color coding itself to indicate if a person was magical, muggle, a squib, or a deity. Several Muggleborns end up finding that they are really descended from wizards, and it goes a long way towards healing the rift between Purebloods, Half-bloods and Muggleborns. (In order to set up for a crossover: Several students learn that they have a Greek or Roman or Norse or Egyptian god somewhere in their family tree.)