The 2009 sequel to the 2007 St Trinians reboot.
Another schoolyear starts at St. Trinian's. This time around, the girls come across a clue to the fabled treasure of one Captain Fritton, the pirate ancestor of the school's headmistress, when a mysterious individual tries to buy it off from them. Turns out that this individual is Sir Piers Pomfrey, a well known philanthropist in British politics, who is also a member of secret misogynist organization called AD1. The girl must then try to outwit him to be the ones to claim the treasure.
This film has examples of:
- Aborted Arc: Roxy's role in the film. She's given a lot of focus at the start, which includes the students fawning over her and arguing about which group she's going to join, but then she just falls out of focus. She barely even speaks in the second half of the film.
- Actually Quite Catchy: Peters starts enjoying the girls' flash-mob and is given an angry look by his boss.
- Arson, Murder, and Jaywalking:Zoe: There's no reason to be scared of death. 'Cause death is, you know, like life, but all of the crap gets taken out. Like poverty and fascism and Miley Cyrus.
- Beethoven Was an Alien Spy: Captain Fritton was not only a Pirate Girl masquerading as a man, she became a playwright called William Shakespeare after she retired from piracy.
- Big Bad: Sir Piers Pomfrey, who wants find the treasure before the girls can.
- Bread, Eggs, Milk, Squick: Comes up when Camilla Fritton is telling to Annabelle that she's making her the new head girl.
- Bullying the Dragon: Sir Piers and AD1 should have known from their reputation that St. Trinian's is not a school to mess with. Then again, his wealth and reputation gave him good reason to think he could succeeed, even without being a chauvinist facing girls.
- Chuck Cunningham Syndrome: Flash Harry is neither seen nor mentioned, making this the only St. Trinian's movie not to include the character.
- Comically Missing the Point: Happens when Lucy tries to insult the ditzy Chelsea.Lucy: Face of a supermodel. Brain of a super noodle.Chelsea: Lucy! Do you really think I look like a supermodel?
- Dance Party Ending: Everyone celebrates with dancing to a song by the Banned of St Trinians after defeating Sir Pomfrey.
- Demonic Possession: Annabelle gets possessed by her ancestor when she and the other girls dig into his grave for more clues to the whereabouts of his treasure. This leads to others girls screaming, Zoe preforming an exorcism, damage to Annabelle's self-esteem, and getting the second half of the clue which was otherwise lost to the ravages of time.
- Drowning My Sorrows: Geoffrey has taken up to heavy drinking after his breakup with Camilla after the events of the previous movie.
- Fake Band: The Banned of St. Trinian's, who are featured in the Dance Party Ending. As the DVD reveals, the actresses playing the band recorded the vocals for the two songs they're show performing (a member of Girls Aloud, Sarah Harding, is a lead cast member in the film, but does not perform with this group).
- Flash Mob Cover-Up: After arriving in London, the girls of the school arrange for a flash mob to provide a distraction so that they can evade the bad guy's surveillance.
- He-Man Woman Hater: AD1, an entire organization which exists for hating women. Both Lord and Sir Piers Pomfrey's motivations are solely because of this as well.
- Hi, Mom!: After Sir Piers have been defeated and exposed by the girls, he gets an impromptu interview by the nearest television crew. After he is done, his assistant Peters walks into the picture mouths "hi mom" and gives thumbs up before being pulled away by his boss.
- Identical Grandson: Applies to both Pomfreys and Frittons, as David Tennant plays the present day Sir Piers Pomfrey and his ancestor Lord Pomfrey, and Rupert Everett plays Miss Fritton and her ancestors Archibald Fritton and Fortnum Fritton.
- Insistent Terminology: Rude Girls, not Chavs.
- Jump Scare: Played for laughs, but a jump nevertheless, as one of these happens when Geoffrey encounters a possessed Annabelle returning to the school.
- Last-Second Word Swap: Geoffrey nearly calls the girls "bitches" during a tirade to gain Pomfrey's trust in the AD1 meeting, but can't bring himself to do so, saying "minxes" instead. Everyone still reacts as though he'd used the B-word.
- The Legend of X
- Lower-Class Lout: The chav clique from the previous film are featured again, this time as Rude Girls.
- Mugging the Monster: When Annabelle tried to get too much money from Sir Piers, she couldn't have possibly known he and AD1 could actually pose a threat to St. Trinian's.
- Mythology Gag:
- The first scene with the policeman saying "They're back," is similar to the first scene of The Belles of St. Trinian's.
- The Travel Montage is very similar to that used in Blue Murder at St. Trinian's.
- Nerd Glasses: Lucy and several of the background geeks have them.
- Number Two: Peters, Sir Piers' assistant who frequently makes the mistake of saying something positive about the girls within his boss' earshot.
- Pirate Girl: Following the example from the late Captain Fritton, the entire school briefly borrows a pirate ship in order to get the proof Shakespeare was a girl back from Sir Piers.
- Samus Is a Girl: "That Sea Dog, was a she-dog." Pirate Fritton was a woman (and also William Shakespeare) . Unlike other examples of this trope, this is blatantly obvious from the get-go.note
- Shout-Out:
- The title of the movie is a reference to City Slickers II: The Legend of Curly's Gold.
- When the school's accountant Bursar is presented with one of the rings that lead to the treasure, he starts reaching for it while saying "My preciousss".
- The film features an amp that goes from one to eleven.
- During the defense of the school from Sir Piers and his henchmen, there's the twins with helmets that read "Born to" and "Kill".
- Sweet Polly Oliver: Half the main cast dress as guys to infiltrate Eton College. Disturbingly, several of the girls look more convincing as guys than some of the male actors cast to play the male students, including one who comes off as a dead ringer for Leonardo DiCaprio, and another who is so handsome as a boy that one of the St. Trinian's girls accidentally takes a shine to "him" before realizing who she is.
- Sword Fight: Geoffrey gets into one with "Romeo".
- Video Credits: Done during the Dance Party Ending, with the credits for the girls and the other school staff presented during the partying, and other credits presented with clips throughout the film.
