It's the annual trials to set the rankings for the Pine Hollow students and Veronica is looking down the barrel of coming second to Stevie...this prompts Veronica to do something extreme.
When Stevie finds a championship medallion in Old Sweetwater, she reunites the medal with its reclusive owner Rosemary Cross who overcomes her tragic past to horse ride again.
Out of the blue, Diablo returns to Pine Hollow and Lisa makes him welcome…but Belle falls sick and Stevie becomes convinced that Diablo has brought a killer disease in from the wilds.