When Sam rescues an abused mare from a group of outlaw horse rustlers, she knows she's done the right thing. But the ranch already has a full corral, a long drought means the cattle are running out of grass, and her dad has told her she can't adopt another mustang. Even worse, the mare is skittish and unruly after being hurt by her former owners. Can Sam get the frightened horse to trust her and find a way to give her a home?

When a terrible blizzard traps the Phantom Stallion's band, Sam is afraid that they will be captured and is determined to help them stay free for good.

Phantom is injured when a lightning storm starts a fire in the wild horse sanctuary, and Samantha worries whether or not he can survive in the wild.

When a volcano erupts and leaves Darby and Hoku stranded during a camping trip, Darby must think quickly to save them both and prevent the untrained mustang from returning to the wild.

When Snowfire and Black Lava, two wild stallions, are forced into the same territory, it is up to Darby and her friend, Ann, to stop the horses' battle from turning deadly.