As Time Turner prepares to celebrate the Ponyville summer sun celebration with his stalker/marefriend, Lucky Catch, he's cut short by a visit from Prince Blueblood, the second most powerful pony in Equestria.
The Prince is haunted by a spectral panther: the creature responsible for the death of one of his predecessors over a thousand years ago. When the Captain of the Royal Guard refuses to waste resources investigating a ghost story, Prince Blueblood takes his aunt's advice: to hire the Discordian Detective to discover why the panther has returned after so long.