Equestria is a land shrouded in mystery. The fogs of crime and murder have rolled in, and it's up to Pinkamena "Sherlock" Diane Pie, and Twilight "Watson" Sparkle to solve the crimes and catch the killers before it's too late. Twilight agrees to play along with Pinkie's insane fantasies, but has she been pulled into a game much bigger than she can fathom?

(Rated teen for mild language, poorly timed Sherlock quotes, and (spoiler alert) MURDER)