Can the innocence of a young and special foal named Heart's Desire bring out the good in King Sombra, a king whose heart has been cloaked and cursed in darkness for over 1,000 years?
Cue is grown up, almost ready to graduate, but she wants to find some way to thank her mother for all that she had done for her...the Wonderbolts might help, but will she be able to handle living by herself while Rainbow is away?