Takes place after the 'Holiday Special' comic of 'Equestria Girls' and the 'No Such Luck' episode of 'The Loud House'.
Sunset Shimmer, still greatly hurt by what she went through during the Anon-a-Miss fiasco, decides to leave Canterlot High and break up with her friends. Along the way, she meets an 11 year old boy with white hair named Lincoln Loud, who ran away from home after getting tired of being perceived as bad luck by his insanely superstitious family and forced to wear a squirrel costume for good luck. The two exchange their histories and quickly become good friends. Meanwhile, Sunset's friends, the Humane 5, and their younger sisters, the Crusaders, miss Sunset and decide to go look for her in hopes of completely making amends and rekindling their friendship. They eventually meet the Loud family, Lincoln's parents and 10 sisters, who are out looking for their son/brother. The two groups decide to join forces and help each other find the people they’re searching for and make amends for their mistreatment.