A unicorn, murdered in cold blood, is awoken by a mysterious figure. The figure tells her that a device she/he gave her will allow her to travel through time, and she must solve her murder. But why would she/he help her? Who is she/he? How many times will she have to die? And most of all, who murdered Twilight Sparkle?

Thanks to Disharmonize for adding detail in chapter 1 and to Kage Kaldaka for future cover art (current art by me), as well as TheWattsMan for editing!

Note: please leave your theories as to the culprit below, I would love to see how you piece it together, but I won't tell if you are right or not :)