3 years ago, Princess Twilight was teleported away from Equestria and sent to another world. After her arrival, she finds out she's on Earth, in a highly top secret military compound known as "Stargate Command", and that there is a war going on for the survival of the entire galaxy. She eventually gets caught up in the war after being allowed to join the star team of SG-1.

Now, after a new gate address is dialed, SG-1 steps through into Equestria, and what starts out as a mission quickly becomes a nice vacation. And of course, Twilight just has to tell of all her adventures through the galaxy.