Ken McLaughlin is a precocious 10-year-old who lives with his family on a remote Wyoming ranch. When Ken returns home from school with failing grades, his father, Rob, blames the boy's lack of personal responsibility. At the suggestion of his wife, Nell, Rob allows Ken to choose a single colt from the herd to raise as his own. Much to his father's dismay, Ken chooses a fiery mustang filly -- but the two soon become fast friends.
Roddy McDowall
as Ken McLaughlin
Preston Foster
as Rob McLaughlin
Rita Johnson
as Nell McLaughlin
James Bell
as Gus
Patti Hale
as Hildy
Jeff Corey
as Tim Murphy
Arthur Loft
as Charley Sargent
