Times are tough at Mercy Ranch, Carlotta Mancini's stable for retired or abused horses. This means, unfortunately, that Carlotta has to sell a few horses, starting with Shelia, a beautiful Black Forest Shire mare. In doing so she's going to break the heart of Sheila's caretaker, Cheryl, and set off a chain reaction of events that will rock the world of all the kids and horses at Mercy Ranch. Will peace ever be restored? Once Ricki, Diablo and friends come to the rescue, hopes are high!.