Twilight Sparkle must put aside her pride and take some lessons from the demi-god of Chaos.

Octavia needs some place to rest from her duties to the orchestra, her daily chores, and an annoying roommate. The night offers the perfect respite. Princess Luna, on her flights over Canterlot, hears a thin reed of music.

Big Mac offers some insight into writing and daily life.

They came here expecting an easy victory. They thought that they could hide, that nopony would notice them. They were wrong. I noticed, and it's my job to get rid of them.

A thousand year old threat returns, weakened, but even more dangerous because of it.