Rarity had gone missing years ago and Detective Sweetie Belle believed that she would find her sister again one day, and this day finally looked promising as she finds a clue from a suspicious stranger that would lead her down the maintenance halls of one of Manehattan's subway stations.
With a clue finally in her hands after years of nothing to show for her work, there was no chance she was going to let it slide by. But things might not be as Sweetie Belle had anticipated and she was about to find out her sister's darkest secret, and darker secrets still.