Joan (Helen Twelvetrees) is a Canadian, adopted by Ma Dawson (Nellie Ferguson), a struggling horse breeder and trainer. Joan thinks "legs don't make a race horse, it's blood", and so she buys an unwanted thoroughbred colt called Stormalong. Helped by Ma's son Tommy Dawson (Frank Leighton), Joan restores the horse to health and fitness, and soon enough the horse is winning race after race, becoming a favourite for the Melbourne Cup.

Helen Twelvetrees
as Joan

Frank Leighton
as Tommy Dawson

John Longden
as Bill Peel

Nellie Barnes
as Judy Cross

Elaine Hamill
as Linda

Ron Whelan
as Genna

Les Warton
as Grafter

Harold Meade
as Sir Russell Peel

Nellie Ferguson
as Ma Dawson

George Lloyd
as Sleepyfeet