Plot

Garden gnomes, Gnomeo and Juliet recruit renowned detective Sherlock Gnomes to investigate the mysterious disappearance of other garden ornaments.

Sherlock Gnomes (Johnny Depp) and his assistant, Dr. Gnome Watson (Chiwetel Ejiofor), storm into London's natural history museum, where their nemesis, a pie mascot named Moriarty (Jamie Demetriou), is holding gnomes hostage, planning to smash them. After a brief battle, Moriarty is defeated by getting seemingly crushed by a dinosaur skeleton. Meanwhile, Gnomeo (James McAvoy) and Juliet (Emily Blunt), as well as the other gnomes, are moving to London. While there, Gnomeo and Juliet are declared the new leaders of the garden. Noticing that Juliet has cast him aside to improve the garden, Gnomeo leaves to find a flower as a centerpiece, but nearly gets caught in a shop, forcing Juliet to rescue him. Gnomeo and Juliet return to the garden, but then find out that all of the other gnomes have gone missing. Sherlock and Watson show up at the scene to investigate, and after Gnomeo and Juliet help them escape from a sewer flood, Sherlock agrees for them to team up.

After they discover that most of the gnomes are missing, two gnomes team up with a male detective gnome to investigate what happened to them and find them before it is too late. Along the way, they discover that there is a sinister plot in motion.—RECB3

Sherlock Gnomes (Johnny Depp) and his assistant, Gnome Watson (Chiwetel Ejiofor), storm into a museum, where their nemesis, a pie mascot named Moriarty (Jamie Demetriou), is holding gnomes hostage, planning to smash them. Moriarty has sworn himself the enemy to every garden Gnome in London, while Holmes is the sworn protector of them. After a brief battle, Moriarty is defeated and seemingly crushed by a dinosaur skeleton.

Meanwhile, now happily in love, Miss Montague (Julie Walters), Mr. Capulet (Richard Wilson), and their gnomes move from Stratford-upon-Avon to a run-down garden in London. Among the gnomes are Gnomeo and Juliet, their star-crossed lovers. The gnomes come to life as soon as the humans are out of sight.

Meanwhile, Gnomeo (James McAvoy) who is Lady Bluebury's (Maggie Smith) son and the leader of the blue gnomes and Juliet (Emily Blunt) who is Lord Redbrick's (Michael Caine) daughter, the leader of the red gnomes, as well as the other gnomes, are moving to London. Lady Bluebury and Lord Redbrick announce their retirement and appoint Gnomeo and Juliet to lead the gnomes.

The gnomes include Paris (Stephen Merchant) a nerdy red gnome who was arranged to marry Juliet, Fawn (Ozzy Osbourne) a garden deer, Mankini (Julio Bonet) a red gnome who wears a Mankini, Barry (Gary Bradbury) a gnome who sits on a toilet, and the Red Goon Gnomes (Kelly Asbury).

Sherlock Gnomes and Watson had started fighting in the house until Mrs Udderson (Eve Webster) tells them to fight outside. Gnomeo and Juliet's relationship becomes strained when Juliet ignores Gnomeo in her efforts to repair the garden. To get her attention, Gnomeo goes to a nearby flower shop that Benny (Matt Lucas) (an impulsive gnome who is Gnomeo's best friend) told him about to get a Cupid's Arrow orchid, but a stall falls over and the burglar alarm goes off. Juliet rescues him, but they argue before returning to the garden after Benny sends them a signal on a Walkie-Talkie informing them that a monster has attacked. There, they find that everyone has disappeared.

Sherlock Gnomes and Watson are informed about the missing gnomes all over the city and decide to investigate the matter. Sherlock Gnomes and Watson arrive at the garden and find a clue card, and reluctantly let them accompany them in their search for clues to find out what is going on.

After Gnomeo and Juliet help them escape from a sewer, they all team up. Watson is shown to be derisive towards Sherlock as Sherlock simply repeats the conclusions that Watson draws moments earlier.

Sherlock inspects a clue given to them by Moriarty, who he believes survived their last encounter. After literally searching his mind, he concludes that the clue is leading them to Chinatown. They find the next clue at Curly Fu's Emporium while escaping from cat guards whom Sherlock Gnomes had offended. After an encounter with some Maneki-Nekos (Chinese kitten dolls), they find the next clue.

They arrive at the Natural History Museum, which Gnomeo attempts to convince Sherlock Gnomes to investigate. The group is split on where the clue is leading, so they split up. Sherlock Gnomes decides to visit an art gallery instead, as it helps him think, and Gnomeo is hurt after Juliet sides with Sherlock Gnomes. After an argument, Gnomeo leaves for the museum with Watson, where he realizes that he was wrong to leave Juliet.

Later, Watson is seemingly killed by a stone Gargoyle (who seems to be working on instructions from Moriarty), saddening the group. Eventually, Sherlock figures out that the next clue is at the park. He and Juliet disguise themselves as a squirrel to get the clue from a dog and barely succeed. Meanwhile, Gnomeo discovers where the gnomes are being kept.

Gnomeo attempts to free the gnomes, but only he and the Red Goon Gnomes escape before the gargoyles arrive. The next clue leads Juliet and Sherlock Gnomes to a doll museum, where they meet his resentful fiance, Irene (Mary J. Blige), who kicks them out, but lets Juliet in after she distances herself from Sherlock Gnomes. Irene gives Juliet the clue, which leads her and Sherlock Gnomes to Traitor's Gate at the Tower of London.

There, Gnomeo and the Red Goon Gnomes were trying to escape from the gargoyles. Juliet and Sherlock Gnomes discover Watson, who reveals that he pretended to be Moriarty to get through to Sherlock Gnomes, who showed no respect or appreciation for him, and is supposedly holding the gnomes captive, but finds that they are missing. The Gargoyles reveal that they never worked for Watson and dispose of him, Juliet, Sherlock Gnomes, and Watson on a ship.

Sherlock Gnomes realizes that the gnomes are being held at the bottom of the Tower Bridge with pie filling and Moriarty reveals that he manipulated Watson into helping him and plans to smash the gnomes with the raised bridge. After witnessing Sherlock Gnomes' mistreatment of Watson, he had the Gargoyles feign allegiance with Watson to access his map and locate the gnomes in London. Sherlock Gnomes and Watson agree to work together to save the gnomes and they and Juliet head to the bridge on a drone.

Gnomeo delays the opening of the bridge by having the Red Goon Gnomes dance before reuniting with Juliet and helping her defeat the Gargoyles. Although Watson frees the trapped gnomes with soap, Moriarty pursues Sherlock Gnomes and injures his leg. Before he can kill the gnomes, however, Sherlock Gnomes throws himself at Moriarty, knocking them over the bridge. Watson saves Sherlock Gnomes with his cane grappling hook, while Moriarty lands in the water and floats away. Afterwards. The gnomes then enjoy the fireworks celebration.

The following spring, Gnomeo and Juliet reveal the completed garden, and the gnomes celebrate with Irene, Teddy Gregson and the cat guards in attendance. Sherlock Gnomes and Watson, having reconciled, set off on another adventure. In the post-credit scene. Lots of gnomes are falling taking a picture of Sherlock Gnomes with his magnifying glass, until Moriarty comes and blows a raspberry at him. then Sherlock Gnomes smashes him with the glass.