Rarity has always had the glamour, charm, and beauty to turn heads and attract any stallion, yet she has always had trouble actually finding one she could call her special somepony. After all, she has a tendency to overwork herself, she can be a tad dramatic, and she has impossibly high standards.
So when she hears Pinkie tell of the Choosing Stone, a magical rock near her family's rock farm that can help a pony find their special somepony, well... Rarity doesn't really need the help, but every little bit helps, right?
...Right?