United Heroez is an organization in New York that watches over the US. This team is the deuteragonistic faction of Miraculous New York. They are the miraculous holders in America. Their goal was to stop Mike Rochip who was akumatized into Techno-Pirate from harassing New York.
In order for the class to celebrate the friendship between France and the United States, Marinette's class is traveling to New York. However, Adrien's father refuses to let him go. In anticipation of her departure, Ladybug asks Cat Noir to watch over Paris but does not specify the reasons for her absence. Cat Noir takes the mission very seriously until Gabriel sees a video of a necklace worn by Marquis de Lafayette and realizes it is a lost Miraculous: the Eagle Miraculous. He permits Adrien to go on the trip so he can accompany them and take it for himself, and Adrien leaves Paris to accompany his friends.
During the flight over, the plane is attacked by the American supervillain Techno Pirate, but they are rescued by American superheroes Majestia, Knightowl, Uncanny Valley, and Sparrow. The group lands in New York and attends a party hosted by some students from Queens. The next day, the French students visit a museum, covertly observed by Uncanny and Sparrow in their civilian identities of Aeon and Jess. However, Hawk Moth akumatizes Techno Pirate and sends the newly-dubbed Techlonizer to steal Marquis de la Fayette's sword. Uncanny, Sparrow, Ladybug, and Cat Noir attempt to subdue him, but Cat accidentally kills Uncanny with an errant Cataclysm. Ladybug is able to revive her, but an angered Knightowl suspends Sparrow for disobeying her and demands the French heroes surrender their Miraculouses. The two flee into the sewers, where a broken Cat Noir renounces the Cat Miraculous as penance.
Meanwhile, Hawk Moth's plan was a success: While the heroes were busy fighting Techlonizer, he was able to walk in and steal the Eagle Miraculous unopposed. He again akumatizes Techno Pirate and gives him the Eagle Miraculous on top of that. Techlonizer, now Miraclonizer, uses the Miraculous's Liberation ability to free the American heroes from their ethical constraints, sending them on a rampage. Uncanny recruits Ladybug and returns the Cat Miraculous to Adrien, and together with Sparrow the four defeat Miraclonizer and reclaim the Eagle Miraculous. Leaving the Eagle Miraculous in Sparrow's hands, the French heroes return home to Paris while Hawk Moth realizes there are more lost Miraculouses he can travel the world to claim. Meanwhile, Uncanny Valley and Sparrow — now Eagle — are approached by a Guardian who demands that they return the Eagle Miraculous to him, but Eagle convinces him to help them protect New York.
Main article: Majestia
Olympia Hill prominently known with her superhero identity as Majestia is the leader of United Heroez. She is the mother of Aeon.
Main article: Knightowl
Barbara Keynes also known as Knightowl, is the best friend of Majestia. She is the mother of Jessica.
Main article: Eagle (Miraculous Ladybug)
Jessica Keynes also known as Sparrow or Eagle is the daughter of Barbara Keynes. She is also Aeon's best friend.
Main article: Uncanny Valley
Aeon also known as Uncanny Valley is the daughter of Majestia and Jessica's best friend.