With the emergence of portals throughout the unsettled regions beyond Canterlot City, the transdimensional Equestrian Defense Force has issued a rushed consignment of experimental ammunition to be used as a deterrent for the giant, anthropomorphic creatures that are coming through and wreaking havoc.

Vapor Trail works at a small airfield that has recently entered into a contract with the EDF and prepares to investigate the sudden disappearance of a radar balloon in the nearby river valley.