Automatons. Ancient clockwork machines, built to resemble ponies. Nopony knows who built them. Why they are there. What they do. Nopony has found an Automaton that could work. Until now.
Derpy's eccentric cousin who fancies himself as a private detective comes to visit. Only Celestia knows what kind of deadly villains and evil plots (of both kinds) will fester in his wake. Can Derpy keep her new family safe from his follies?