As a baby, Princess Sara (voiced by Georgi Irene) of Thurinia was saved from the clutches of the evil Lady Diabolyn (voiced by Jessica Walter) by a mystic talking horse named Wildfire (voiced by John Vernon) following the death of Sara's mother Queen Sarana (voiced by Amanda McBroom). Wildfire took her away from the planet Dar-Shan and deposited her in Montana where she is taken in by a farmer named John Cavanaugh (voiced by David Ackroyd). Lady Diabolyn was a stepsister to Queen Sarana whom she always considered weak and unfit to rule; to gain her "rightful" throne, she learned dark magic and allied herself with the demonic Spectre.