A little trip to Canterlot is the kind of relaxation Thunderlane needs. One little incident introduces him to a guard that leads to a friendship and awkward feelings on the part of the small town pegasus. What do you do when you don't know what this feeling is? And why can't he stop staring at the guard's clothes?

In the wake of the events of "Infernal Machines" and the Nightmare's most pathetic assault on Ponyville yet, Applejack is thrown into an existential crisis, despite her not knowing what the word "existential" means. So when a stranger named Stranger arrives in town, teaching a new way of coupling talent to power using complex machinery, she is quickly suckered in, along with everypony else. Now, it falls to the Most Dependable of Ponies to bring the resulting ruckus down to earth, but can even Applejack's legendary pragmatism stand up to the brain-fizzing horror that is... CONTRAPTIONOLOGY?

Now with a Spanish translation by Spaniard Kiwi!