After working together to save Equestria, Rainbow Dash and Flash Magnus ended up becoming really good friends. So close in fact, that Dash was curious about taking things further. However, Flash seemed to be resistant for an odd, but big reason...
Drafted into the defense of Equestria, the Crusaders volunteer to embark a series of dangerous operations behind enemy lines to cripple one of their chief technological advantages, a revolutionary spell matrix that Twilight refers to as the "radio."