The wild, black stallion that Amy rehomed from Will's ranch is brutally forced out of the herd by the new leader, Caz, leaving Amy to track down the injured horse and nurse him back to health. Meanwhile, Tim and Jack discover a hidden baseball diamond on Sam Langston's property, but Sam refuses to let them use it for a charity game. And Jessica Cook, Lou's old mentor from New York arrives at the dude ranch, stirring up old wounds for Lou, and new feelings for Tim.