Sunset Shimmer and her friends, Pinkie Pie, Rarity, Applejack, Rainbow Dash, Fluttershy, and Twilight Sparkle, gear up to help Canterlot High’s yearbook take shape for the new school year. The office buzzes with activity as the group sorts photos, captions, and memories, trying to capture the spirit of their year. In the midst of the planning, a new face slips into the room: Wallflower Blush, a quiet, overlooked girl who has seemingly faded into the background of the school’s bustling social scene. Her presence contrasts sharply with the loud, upbeat energy of Sunset and her friends, and she quietly watches as the photoshoot unfolds.
Trixie makes a dramatic entrance, demanding that Sunset include her in the yearbook under a very flashy category: “The Greatest and Powerfullest.” The demand comes with a taunt, a reminder of Sunset’s reputation from the very first Equestria Girls movie. Sunset points out that such a category doesn’t exist, but the moment still stings. Trixie, nursing hurt pride, vows revenge and leaves the room with a vow that lingers in the air like a spark.
The following day brings a sunlit change of scenery as Sunset heads to the beach with her friends, hoping for a carefree afternoon. Instead, she discovers something unsettling: the memories of her and her friends have begun to fade away at the edges. Rarity, Rainbow Dash, Pinkie Pie, Fluttershy, and Applejack can only recall Sunset’s missteps when she was a bully, and Twilight’s memory of Sunset is tied to a moment of anger they shared during the Friendship Games. Sunset tries to remind them of their true bond, but her attempts are met with fading recollections and stubborn doubt. Desperate, she reaches out to Ponyville’s Twilight Sparkle and swallows her pride to ask for help, hoping the other Twilight remembers their friendship.
When Twilight confirms memories of Sunset, the two travel to Equestria to seek guidance from Princess Celestia. Sunset, now returning to the parallel world with a sincere apology, explains everything to Celestia, Luna, and Twilight. The reunion is earnest, and together they begin to investigate the strange magic at play, hoping to uncover who or what is erasing memories. Their search leads them to ancient writings about a powerful artifact known as the “Memory Stone,” a relic capable of erasing memories—both whole and fragmented—and a relic that somehow spilled into this parallel world when Clover the Clever defeated a sorceress with its help long ago. The trio realizes that someone is using the stone to weaponize memory and sow discord, and time is running out.
Back at Canterlot High, Sunset and Trixie set out to uncover the truth in the parallel world. They interrogate students and search the halls, but the trail goes cold. Meanwhile, in Equestria, Twilight uncovers a critical clue: the Memory Stone’s effects become permanent if the stone isn’t destroyed by the third day after its use. She broadcasts a warning to Sunset, who reads the message and studies a drawing that could indicate the stone’s location. The drawing bears a striking resemblance to a scene in Wallflower’s screensaver—an eerie hint that Wallflower Blush might be behind the fear-inducing erasures.
In the yearbook office, Sunset confronts the possibility head-on as she studies Wallflower’s file and the signals in the drawing. She discovers that Wallflower is, in fact, the culprit: the girl who felt unseen and unimportant has been erasing everyone’s good memories of Sunset as a twisted longing for recognition. The revelation shocks Sunset, but she remains focused on the bigger goal: stopping the damage and saving her friendships. Wallflower explains her motives, and Sunset tries to reason with her, but the truth isn’t simple. Wallflower insists on her plan, and Sunset makes a bold move to reclaim the situation. The two confront each other, and Wallflower seizes the moment to erase Sunset’s and Trixie’s memories of their meeting to prevent exposure.
Sunset, however, had prepared for this possibility. A drone recording created by the parallel world’s Twilight earlier captures the whole encounter, preserving what really happened and giving Sunset the means to prove her case. Trixie uses a bit of her stagecraft to help Sunset break free, though she must stay behind. With the truth on the line, Sunset faces Wallflower in a tense showdown in the school’s parking lot. Wallflower blurts out her actions, and Sunset’s friends finally witness the truth through her eyes. When Wallflower attempts to erase all of Sunset’s friends’ memories of high school, Sunset makes a sacrifice: she allows her own memories of the parallel world to be erased instead. The act is a heartbreaking gesture meant to protect those she loves, a moment of selflessness that tests the strength of their friendships.
Moved by Sunset’s sacrifice, Sunset’s friends realize the depth of her honesty and perseverance. They stand by her side, openly reaffirming that she is their friend, no matter what. Their geodes flare to life, transforming them into their Powered Forms, and together they destroy the Memory Stone, restoring everyone’s memories to their rightful state. The group apologizes to Sunset for their earlier fear and distance, and Sunset simply forgives them, grateful to have them back the way they were. Wallflower, now truly repentant, explains that her actions were driven by a dangerous mix of power and insecurity, and the group forgives her too, understanding that she was corrupted by the stone’s influence.
The next day, Sunset shares the news of the stone’s destruction with Twilight Sparkle, thanking her for the guidance and the support that helped piece everything back together. The yearbooks roll off the presses, and the school’s record of the year closes with a sense of reconciliation and renewed friendship. Trixie discovers that Sunset kept her end of their deal, and Wallflower realizes that her own best work—her signature as a gardener—now carries the signatures of Sunset and the others, symbolizing her place among them once more.
In the end, the story is one of memory, forgiveness, and the power of friendship. The six friends reassemble, their bond restored after a perilous test, and they move forward with a stronger, more trusting connection. Sunset’s leadership and courage stand at the center of it all, a reminder that true friendship endures even when memories waver, and that the greatest achievement of all is the chance to make things right for those you care about.
