The film opens with the wizard Merlin (Patrick Stewart) telling the story of Lord Arthur. After the demise of Lord Uther Pendragon, England fell into battle with many needing to manage over the land. Merlin created Excalibur to see who might deserve becoming lord. Arthur pulled the sword from the stone, yet his relative Morgana Le Fay (Rebecca Ferguson) needed capacity to herself and to project a dim sorcery over England. Arthur and his knights battled against Morgana and cast her into the hidden world, where she promised to return when the world was at its most obscure point.In the current day, 12-year-old Alexander Elliot (Louis Ashborne Serkis) lives with his mom (Denise Gough) and goes to a tuition based school. On the transport ride to school, he gets a text from his companion Bedders (Dignitary Chaumoo), who is getting hassled by menaces Spear (Tom Taylor) and Kaye (Rhianna Doris).
Alex faces them and orders them to let Bedders be. Spear attempts to threaten Alex and prevent him from attempting to be a legend. As he leaves, Alex pursues him and jumps on his back, beating on him before different children. Mrs. Elliot later tracks down an injury all over from the battle. Alex needs to make right the wrongs of the world, despite the fact that it causes him problems, as he feels his alienated dad would believe he should do as such. His mother hasn’t enlightened him much regarding his father however has caused him to appear to be some sort of legend who actually focused on Alex.
The following day after school, Spear and Kaye pursue Alex to complete the battle. Alex runs toward a structure site and is cornered close to an edge by the harassers until he falls in reverse and is thumped oblivious. Spear and Kaye take off in dread. Alex comes to and finds a sword caught in a stone. He figures out how to haul it out and use it. Far beneath in the hidden world, Morgana stirs and faculties that the blade has been found. She makes plants that will search out the one that currently uses the sword.
Alex brings Bedders over to look at the blade. In the wake of deciphering what was composed on the blade, they understand it is Excalibur, as Alex keeps a book given to him by his dad on Lord Arthur and the Knights of the Round Table and perceives the world Tintagel from the book just like an island where Excalibur was made. Alex chooses to take the blade and knight Bedders.
Merlin detects that the blade has been found, thus he enters town seeming to be a teen (presently played by Angus Imrie). He comes to Alex’s school to claim to be a student and draw nearer to Alex. Merlin gains from an educator that an overshadowing is drawing near three days time, which makes him alarm. He later blasts into the cafeteria to tell Alex he realizes he hauled Excalibur out and that Morgana will rise again when the shroud happens, which simply cracks Alex and Bedders out.
That evening, Alex tracks down a skeletal flunky of Morgana’s coming to go after him in his home, and his mother is mysteriously absent. Alex surges toward Excalibur, however similarly as the crony attempts to strike, it is obliterated by Merlin. Be that as it may, being in the human domain after twilight is risky for him, and he rapidly withdraws in his owl structure.
Alex and Bedders find Merlin working at a broiled chicken shop since the fixings in the chunks, pop, and frozen yogurt from that point contain components that give him food (creepy crawly blood, beaver pee, and ground creature bones). He tells the young men about Morgana and how she intends to return since the nation has fallen into confusion and chaos. Alex would rather not assume on the liability of saving everybody until Merlin transforms into his old self and shows the young men a dream of what all that will resemble in the event that they don’t find Morgana in the hidden world and battle her there before she is free and releases her military, the Mortes Milles. Alex is gone crazy once more however presently realizes it is his obligation to make all the difference. He advises Bedders that they need to go to Tintagel to track down his dad, since he believes that like Arthur, who didn’t have the foggiest idea about his dad, Alex is intended to track down him and have him assist them with halting Morgana.
The young men go by the structure site once more and run over Spear and Kaye. Alex returns the blade to the stone and moves the domineering jerks to haul it out. After they fizzle, he hauls it out once more. He persuades the two to stoop so they can be knighted, and despite the fact that they believe it’s an imbecilic thought, they do so.The Mortes Milles then, at that point, make an appearance to assault. Spear attempts to remove the blade from Alex and fend them off himself, however it doesn’t work. Alex helps him up as the four take off and find the roads unfilled, as each and every individual who hasn’t been knighted will disappear when the Mortes Milles show up. They take a vehicle and figure out how to obliterate the followers, yet this brings every other person back and nearly goals a car crash in the turmoil. The four return to Alex’s home where he figures out how to persuade everybody to go along with him in a mission to Tintagel to track down the entry to the hidden world and battle Morgana. Nonetheless, Morgana has her eye on them and faculties the shortcomings in every one of them, expecting to utilize these for her potential benefits.
Alex leaves a note for his mother, who had recently attempted to inspire him to quit discussing Excalibur as though it were genuine, and presently she thinks he has taken off. He joins Bedders, Spear, Kaye, and Merlin as they take a transport to Stonehenge where they will draw nearer to tracking down the entry to the hidden world. Subsequent to going through, Merlin has the four train to be better contenders. They battle against dim roots constrained by Morgana. She utilizes her wizardry to maneuver Spear toward taking Excalibur for himself. The roots develop further and pull the children more profound into the earth until they call out for Merlin, who returns and sends the roots back underground. The others rebuke Spear for what he did, despite the fact that he assumes he merits the sword more. Alex and Spear then, at that point, battle, bringing about Spear breaking Excalibur. Alex reprimands Spear for destroying all that and simply being a skeptical jerk. Kaye apologizes for their sake yet adds that they are menaces in light of the fact that the world is now bad. As they are going through a muggy region, Alex drops the messed up sword into the water, which is then gotten back to him after he understands he can call the legendary Woman of the Lake. It works, and she gives Alex a fixed Excalibur.
The companions set up for business for the evening. Alex goes off all alone to Tintagel to track down his dad. He goes over a house off a location he got from his mother. There, he tracks down his Auntie Sophie (Genevieve O’Kelley). Alex requests him, accepting that he was a legend like his mother portrayed him, and that he was battling evil presences as she depicted to him. Sophie then comes clean with Alex about his dad. His evil presence was liquor addiction, and he left him and his mother since he couldn’t have cared less about them. Mrs. Elliot attempted to visit him with Alex at one highlight check whether he changed, however he hadn’t. The book wasn’t even from him, it was from his mom. Alex is sorrowful to figure out what sort of man his dad was, and he gets back to Bedders feeling miserable. Bedders then utilizes a metal-copying stunt he gained from Merlin in a manner to encourage him and persuade him that he isn’t miserable to confront Morgana. Spear, Kaye, and Merlin likewise make an appearance to give Alex a certainty support.
The legends ride ponies until they run over an area that prompts the hidden world. Down there, Alex encounters Morgana. She sends her followers to go after his companions as she changes into a colossal flying animal who attempts to kill Alex. He employs Excalibur and afterward cuts Morgana in the chest, apparently killing her. The put begins to implode on itself, yet the legends get out before they are caught. Alex tosses the sword to the Woman of the Lake and gets back, it is triumphant to think he.
The following morning, Alex stirs to find his home shrouded in roots, meaning Morgana is alive, and the obscuration is occurring that evening. That’s what he understands in spite of the fact that he assumed he followed the code expected to overcome Morgana, he wasn’t consistent with his friends and family. Alex goes to his mom and apologizes for how he acted with her and being angry at her for lying about his dad. He then goes to the bath to demonstrate to her that Excalibur is genuine by having the Woman of the Lake return him the sword.
With assistance from his companions, Alex persuades the headmistress to gather together every one of the understudies together to assist him with battling. They giggle from the start, thinking he is simply being a geek, until Merlin demonstrates who he is with his wizardry, and the understudies are persuaded to join after the headmistress lets them know this will be rather than examples that day. Bedders copies reinforcement and weapons for the understudies to utilize.
The shroud comes, thus does Morgana and the Mortes Milles. The understudies accumulate and take out the skeleton evil presences, yet much more beginning emerging to battle. Morgana tracks down Merlin and debilitates him. Alex finds him and brings him liquified pieces, pop, and frozen yogurt to resuscitate him. It works, and Merlin assists the understudies with retaliating. Alex draws near to the point of getting on top of Morgana and hit her with the sword, beheading her. Her tremendous body is maneuvered into the hidden world as the other devils are vanquished. Everything has returned to ordinary.
Merlin expresses goodbye to Alex and his companions, as there will come some other time when they are required once more. Until further notice, Alex has new companions and another feeling of direction to be the positive qualities in a dim world. With that, Alex tosses Excalibur back toward the Woman of the Lake.