Severus Snape: A girl has been snatched by the monster, Lockhart. Your moment has come at last.
Gilderoy Lockhart: My moment?
Severus Snape: Weren't you saying just last night... that you've known all along where the entrance to the Chamber of Secrets is?
Minerva McGonagall: That's settled. We'll leave you to deal with the monster, Gilderoy. Your skills, after all, are legend.
Gilderoy Lockhart: Very well. I'll just be in my office getting... Getting ready.
Hermione Granger: Professor... I was wondering if you could tell us about the Chamber of Secrets.
Minerva McGonagall: Very well. You all know, of course... that Hogwarts was founded over a thousand years ago... by the four greatest witches and wizards of the age: Godric Gryffindor, Helga Hufflepuff... Rowena Ravenclaw and Salazar Slytherin. Now, three of the founders coexisted quite harmoniously. One did not.
Ron Weasley (to Harry): Three guesses who.
Minerva McGonagall: Salazar Slytherin wished to be more selective... about the students admitted to Hogwarts. He believed magical learning should be kept within all-magic families. In other words, pure-bloods. Unable to sway the others, he decided to leave the school. Now, according to legend... Slytherin had built a hidden chamber in this castle... known as the Chamber of Secrets. Though, shortly before departing, he sealed it... until that time when his own true Heir returned to the school. The Heir alone... would be able to open the Chamber... and unleash the horror within, and by so doing... purge the school of all those who... in Slytherin's view, were unworthy to study magic.
Hermione Granger: Muggle-borns.
Minerva McGonagall: Well. Naturally, the school has been searched many times. No such chamber has been found.
Hermione Granger: Professor? What exactly does legend tell us lies within the Chamber?
Minerva McGonagall: The Chamber is said to be home to something... that only the Heir of Slytherin can control. It is said to be the home... of a monster.
Minerva McGonagall: Perhaps, it'd be more useful if I were to transfigure Mr. Potter and yourself into a pocket-watch. That way, one of you might be on time.
Harry Potter: We got lost.
Minerva McGonagall: Then perhaps a map? I trust you don't need one to find your seats.
Minerva McGonagall: Albus, do you really think it's safe, leaving him with these people? I've watched them all day. They're the worst sort of Muggles, imaginable. They really are...
Albus Dumbledore: The only family he has.
Minerva McGonagall: This boy will be famous. There won't be a child in our world who doesn't know his name.
Albus Dumbledore: Exactly. He's far better off growing up away from all of that. Until he's ready.
Minerva McGonagall: Do you think it wise to trust Hagrid with something as important as this?
Albus Dumbledore: Ah, Professor, I would trust Hagrid with my life.
It was always difficult being Harry Potter and it isn’t much easier now that he is an overworked employee of the Ministry of Magic, a husband and father of three school-age children. While Harry grapples with a past that refuses to stay where it belongs, his youngest son Albus must struggle with the weight of a family legacy he never wanted. As past and present fuse ominously, both father and son learn the uncomfortable truth: sometimes, darkness comes from unexpected places. (Wikia) │ Written by J. K. Rowling, Jack Thorne and John Tiffany