Equestria is under attack by the changelings in many places, one of which being Fillydelphia. Many have died, few have survived. Two of which are a pair of sisters: Ready Steady, a track and field athlete that's known to have good records on ground AND in the skies, and Get Set, a little filly who wishes to follow in her older sister's hoofsteps. Their escape by train led them to safety, but in different locations. How will these two sisters reunite with one another? Are they're capable of protecting themselves from any more changelings?