The horses know the evil secret that Southoak Stables holds.
Molly is excited when she gets a summer job at the elite Southoak Stables. She is quickly drawn to Chesterfield, and they form a strong bond.
But fear soon evades the peacefulness of Southoak. The horses are restless, refuse to go in their stalls, and startle easily. When Molly is attacked in the stables one night, the horses rear up, trying to fight off the evil enemy that has taken hold of Southoak.
Can Molly uncover the terrible secret of Southoak before it destroys her and the horses that she loves? And what is that horse in the empty stall?