After seeking refuge in Equestria during the Anon-A-Miss fiasco, Sunset Shimmer is stranded in Equestria. Convinced that she's just not cut out for friendship, Sunset throws herself back into her studies. Unfortunately for her, all the magic around CHS has attracted the attention of a certain spectacled scientist. When her device accidentally pulls the mysterious energy from the statue in front of the school, she is shocked when an amber unicorn was pulled out with it. With the portal not working, the two must work together to gather the energy needed to send Sunset home from the only magical source left to tap: Sunset's former friends, all while dealing with the overbearing principal of Crystal Prep as the Friendship Games approach.

The Mane five have been having these awful dreams where they abandon this strange creature and leave her crying, their cutie marks start glowing and they visit Twilight to ask what is going on, they find her in the library preparing to leave on a trip. She explains to them what is going on and they noticed similarities between Anon-A-Miss and what happened at Cadance's wedding, as Twilight prepares to leave, a very sick Spike stumbles in, and Twilight immediately goes to him and diagnosed him with a unicorn illness. With her being the only one to treat it it is up to her friends to help Sunset and save the Rainbooms friendship.

Sunset Shimmer is devastated since her friends abandoned her because of Anon-A-Miss. While she tries to figure out what to do a new girl arrives in town, not knowing that she will be involved into an event she doesn't know about or has control over.