Larry Daley and his heroic friends embark on the greatest adventure of their lives, as they travel to London to save the magic that, after dark, allows the museum's exhibits to come to life.
At the Museum of Natural History, there's a new exhibit being unveiled. Larry Daley, who manages the night exhibit where the exhibits come to life because of the Tablet of Ahkmenrah, is in charge of the presentation. But when the exhibits go awry, Larry finds himself in trouble. He learns the Tablet is corroding so he does some research and learns that Cecil, the former museum guard, was at the site when the Tablet was discovered. He tells Larry they were warned if they remove it could mean the end. Larry realizes it means the end of the magic. He talks to Ahkmenrah who says that he doesn't know anything. Only his father the Pharaoh knows the Tablet's secrets. He learns that the Pharaoh was sent to the London museum. So he convinces Dr. McPhee, the museum curator, to help send him to London. He takes Ahkmenrah with him but some of the others tag along, like Teddy Roosevelt, Attila, Octavius, and Jedediah.—[email protected]
When Larry discovers that the Tablet of Akhmenrah is corroding, thus causing his exhibit friends to act abnormally, he must travel to the British Museum in London in order to find Akhmenrah's parents and help them reverse the corrosion before the magic disappears and the exhibits will go lifeless again.—Affan Jamsari
With the magical force of the ancient Tablet of Ahkmenrah starting to deteriorate after the events in Night at the Museum: Battle of the Smithsonian (2009), Larry's reanimated exhibit friends gradually lose their powers. To get to the bottom of the mystery, he and a handful of the exhibits travel to the British Museum in London, seeking enlightenment and a radical solution. However, the question remains. Can Larry survive one last night at the museum before it's too late?—Nick Riganas
A night guard of the Museum of Natural History and some of the exhibits must travel across the globe in order to rescue the magic of the secret of the museum. They must find out how they can do that before time runs out and everything is lost.—RECB3
In 1938, in Egypt a team of archaeologists are digging into a tomb to look for a valuable artifact. A young boy falls through a hole that leads his father and the others to what they came for - the tablet of Ahkmenrah. Several local men see the tablet and say that if the archaeologists remove it, then "the end will come".
In the present day in New York City, Larry Daley (Ben Stiller) is overseeing a nighttime event at the Museum of Natural History with Dr. McPhee (Ricky Gervais) in attendance. Larry gathers the favorite exhibits, including Theodore Roosevelt (Robin Williams), Attila the Hun (Patrick Gallagher), Sacagawea (Mizuo Peck), Dexter the Capuchin Monkey, and Rexy the Tyrannosaurus skeleton. Elsewhere, Jedediah (Owen Wilson) and Octavius (Steve Coogan) are watching a cat video on YouTube.
Larry meets a new wax figure Neanderthal named Laa who was modeled to look like Larry as a joke. Ahkmenrah had earlier alerted Larry to the fact that the tablet is starting to corrode, causing all the exhibits to act abnormally. The corrosion causes chaos during the event, with the attendees having to flee from dangers caused by the affected exhibits. When Larry returns home, he catches his son Nicky throwing a party for which he is serving as the DJ. Nicky tells Larry that he does not intend to apply to college, wanting to take time to pursue being a DJ and to figure out what he wants to do with his life.
Larry researches the tablet and learns that Cecil Fredericks, the former museum security guard that tried to steal the tablet for himself, was the boy present at the discovery of the tablet. Larry finds Cecil in a retirement home along with his cohorts Gus and Reginald. Larry explains to Cecil what is happening, and he recalls "the end will come" prophecy, realizing it was not an "end of the world" prophecy but a reference to an end to the magic. He suggests that they consult Ahkmenrah's parents, who are in the British Museum. Larry later goes to Dr. McPhee, who is in the process of being fired, and convinces him to call the British Museum and allow Larry to travel there with Ahkmenrah and the tablet.
Larry and Nicky travel to London to get to the British Museum. They meet the security guard of that museum, Tilly, who lets them through the gate. When Larry gets into the museum, he sees that Laa, Teddy, Sacagawea, Attila, Dexter, Jed, and Octavius have all stowed away to join on the adventure. The Tablet brings the British exhibits to life and the gang encounters a Triceratops skeleton which chases them. They are saved by Sir Lancelot (Dan Stevens). Lancelot loves Queen Guinevere but has been sent on a quest by King Arthur to find the Holy Grail & ordered not to return without it. Unfortunately, the gang has lost Jed and Octavius; they discover that they have fallen into the ventilation chambers. Larry sends Dexter into the ventilation with Nicky's cell phone attached to his waist to find Jed and Octavius. Jed and Octavius land on a Pompeii exhibit just before it erupts. The gang fights off a nine-headed Xiangliu statue, which Larry defeats using a defibrillator. Meanwhile, Dexter urinates on the lava to save Jed and Octavius.
The gang finds the tombs of Ahkmenrah's parents, Merenkahre (Ben Kingsley) and Shepseheret. Merenkahre is at first hesitant to reveal the truth behind the Tablet, but he eventually admits that it was a gift made for his son when he was a baby to keep the family together always. Endowed with the power of Khonsu, the tablet needs moonlight to retain its magic.
Lancelot steals the tablet, thinking it to be the Holy Grail and then leaves to find Guinevere. The tablet continues to corrode, causing Teddy's hands to return to wax and Ahkmenrah to age. The gang splits up to find Lancelot and regain the tablet, but Larry is caught by Tilly, who then locks Larry and Laa in the security room. There, Larry starts to think about his relationship with Nicky. Laa eventually smashes the glass of the door with his head to free Larry and himself. Larry and the gang continue to search for Lancelot again but are cornered by the Trafalgar Square lion statues. Larry distracts them with a flashlight like in the cat video Jed and Octavius had previously watched on YouTube.
Lancelot has made his way to a local theater showing a Camelot production starring Hugh Jackman as King Arthur and Alice Eve as Guinevere. Sir Lancelot runs onstage with the tablet and tries to convince "Guinevere" to join him. The actors eventually convince Lancelot that they are actors, upsetting Lancelot and causing him to take a lighted torch from the stage and run to the roof. Larry and the gang chase Lancelot and attempt to get him to adjust the tablet appropriately in order for the moonlight to restore it. Larry convinces Lancelot to give him back the tablet to save his friends once the other exhibits all return to their lifeless state due to the corrosion of the tablet. Larry then adjusts the tablet, and it is restored by the moon, reanimating Teddy, Dexter, and the rest.
Larry returns the tablet to Merenkahre after the New York exhibits explain that they believe the tablet and the pharaohs should stay together. On the way out, Larry catches Tilly and Laa in a romantic moment. As they leave, Larry tells Tilly that, starting the next day, she will have the greatest job in the world. Back in New York, the exhibits accept their fate and say goodbye to Larry.
Three years later, a British Museum treasures exhibition event is happening at the American Museum of Natural History. Tilly shows up to McPhee's office with a box. McPhee explains that Larry left the museum and went on to become a teacher, after taking the blame for what happened when the exhibits went ballistic, granting McPhee his job back. Tilly opens the box and takes out the tablet. She brings Dr. McPhee to show him all the exhibits coming to life, including some new light displays. The exhibits then have a party.
Outside, Larry pauses on the sidewalk to see the flashing lights from inside the museum; as he watches, he smiles.
