Lemon Zest returns home one day to find all of her best friends waiting to throw her a cheer-up party, but Sour Sweet spends the day acting a bit strange...
After the friendship games everything returns back to normal at Crystal Prep Academy. However, five students seem influenced by the spirit of friendship they witnessed at CHS, and are unwilling to go back to the cold-hearted usual of their school.
Lemon Zest is pretty lucky for a pony who just got fried to death. She miraculously comes back as a ghost and stumbles on a haunted school where she can learn the basics of the afterlife. The fee of tuition? Recruiting more ghosts to school.
Lemon Zest is on her way to a friend's house when she runs into another girl lost in her headphones from her rival school Canterlot High... but do they really have to be enemies?