Sherlock Holmes and Doctor John Watson have solved many cases together. They've seen death, destruction, and more in their line of work. In short, they have come to expect the unexpected.
They never could have predicted they would be turned into ponies. Or sent to Equestria. Or that there would be a case there steeped in magic, fear, blood and betrayal.
Buckle up, kiddies. It's about to get weird.
Both Sherlock and Watson are from the BBC series Sherlock. Takes place after Baskerville, before the last episode of the second season.