Because her father is ill, without telling her parents, horse-loving Trish earns money after school at the race track, where trouble begins when one of her mounts is in a mysterious accident.

Having won the Santa Anita Derby, Trish and her horse look forward to competing in the Kentucky Derby, until a series of misfortunes interferes with their dream.

As sixteen-year-old Tricia grieves over the death of her father, she loses interest in horse racing and begins to question the wisdom of God.

Although still grieving her father's death and facing ominous threats, Trish helps petition the Portland City Council to keep open a local thoroughbred horse racing track embroiled in rumors of corruption.

As she and her filly Firefly recover from a tragic racing accident, Trish tries to find out who is behind the disturbing threats she continues to receive and she discovers that God has a perfect plan for her life.