Summer is coming to an end, and the girls are getting ready for college. All except one, Sunset Shimmer, who feels anxious and uncertain about her future. But before she can figure things out, a new problem arises: their magical geodes have begun mysteriously disappearing one by one. (Based on the unused story concept by Nick Confalone for Equestria Girls) While the girls face this troubling mystery, another truth lingers in the background. The powerful ancient Equestrian spell Sunset once cast to open the portal created an imbalance that was never fully resolved. Her arrival in the human world displaced someone, an innocent character we've never seen, yet whose absence is felt every time Sunset is on screen. In this version of the story, we'll finally uncover what really happened to the human Sunset Shimmer.

Twilight Sparkle was an ordinary high school student until she found herself curious about solving a murder case that occurred on the first day of school, along with the new transferee, Sunset Shimmer. They both became the founders of the C.H.D Club and proceeded to solve crimes on and off-campus. Join the two C.H.S Detectives as they piece together the jigsaw of mysteries and bad intentions, and meet new people who will join them in solving cases at Canterlot High School.

Twilight is a shy nerd, that has spent most of her days in the hospital because she has cancer. The only thing that keeps her sane is her Best friend Fluttershy, that is Deaf. But what happens when she's also best friends with a online person named FirePheonix78, and Twilight's life is on the line...with two months left to live, she chooses to travel to Paris....but a mysterious girl bumps into her. She speaks French, but her name is Sunset Shimmer....what happens if they fall in love, and find out the truth of their friendship....will the two of them stick together to the end, or with life give in for Twilight. And it's the dark end for them both.