It has been several years since The Great 'Toon war,and Derpy hasn't made it make home.When it is suggested to Dinky to go look for her,she goes on an epic quest to find her.Derpy also has to share her story of what has happened over the years she's been gone.Several mares have stayed in Dinky's house,believing that Derpy's choice of leaving Dinky in the care of Doctor Whooves was not a wise one..