A dragon wanders into a land that banished him centuries ago. Never did he imagine he would return, but when the sun and moon failed to rise one fateful day, something compelled him to begin the journey home to the princess who shattered his heart.
As a result of a magical mishap in the name of protecting Equestria, the princesses fuse into a single being. But in order to bring them back, she will have to stop existing. What does it mean to die?
On the fourth day of the fourth month of every year, Equestria pays homage to its fallen heroes. As daylight sets on this solemn ceremony, the immortal sun bows before the soldiers who died for her, and asks a question for which there is no answer.
After Misty flees the sleepover, Zipp notices she's still in the garden outside the Crystal Brighthouse. Zipp ends up learning something unexpected about the strange newcomer -- and how she can help.
As she leaves for a diplomatic errand, Celestia is approached by her student, Sunset Shimmer, for a difficult, fateful discussion. Can she bridge the vast gulf that has grown between them?
"So, why do you flinch when they laugh? It's a subtle thing, but... your ears start twitching, your body stiffens, and your eyes get this... panicked look in them. We may not know each other, but... I can't help but worry."