One day, on 379th Acorn Avenue, Sunset Shimmer, the Daughter of her mother Solar Eclipse is preparing breakfast for herself when she finds a mysterious letter, she is then jumping for joy when she finds out that it's an acceptance letter to Hogwarts school of witchcraft and wizardry. Her mother was excited and proud of her daughter. After saying farewell to her mother, she heads off to Diagon Alley. After getting supplies from Diagon Alley, she gets help by three sisters to get to Platform nine and three quarters in order to get to the Hogwarts Express. Once she gets to Hogwarts, she encounters the three sisters again named, Adagio, Aria, and Sonata. Even though Adagio and Sonata are pretty neutral and friendly, Aria appears to be the meanest of the three, as she would antagonize her own sisters as much as other students.

As all students were then escorted to the great hall, each student is called so the sorting hat can place each student into their proper house. When Sunset Shimmer is called up, the sorting hat puts her into Slytherin due to her calm nature and eagerness to learn. She also makes friends with others along the way.

If studying many spells or dealing with bullies was bad enough, there appears to be a dark force that is after a relic known as a spectrometer, a device that can absorb magic out of a person's body. Can Sunset and her new friends stop this evil as well as complete their studies?