When Luna finds out the wereabouts of an artifact of great power, that belonged to her before the thousand-years-exile, she gathers her best and most trusted Guards, who can blend in with normal ponies, stay unseen in the light of Celestia's sun, to recapture what is rightfully hers.
But before they could start on their mission, they'll need another member, a certain changeling that could make their efforts considerably easier...provided they can catch him.
They must become a real team to get their hooves on the elusive bug, and with him the chance to recover Luna's artifact.
The chase ensues and turns Ponyville upside-down, but this time Discord is innocent.