Spike and Luna have started a relationship, but a week later the Griffin Empire invades Equestria, drafting Spike into the war. Now three months away from each other Spike and Luna have the opportunity to see each other again for one night, the night of the Grand Galloping Gala and they plan to make the best of it.
So Spike takes Luna to the Palace Gardens, and to a secret hot spring that he has never shown anypony before.