Lunar Star and Night Shadow, two royal Day Guards, are just given a mission from Princess Celestia herself to explore a distant planet and know about their lifestyles, culture, among others.
As they explore the planet, Terra (Earth), they soon discover some people are not very likely to be helpful to them.
However, as they have an exploration team, called the Classified Command Squad, the two former pegasus-turned-humans discover some deeper secrets about this distant planet.
An action adventure-focused fanfiction.