Princess Isabella returns incognito to the royal capital after years in wilderness isolation perfecting a miracle cure for the fatal kingdom epidemic. Eager to present the medicine to her royal father, King Arthur, on his birthday, she halts a runaway carriage driven by Arthur’s arrogant new bride-to-be, Margaret, who terrorizes peasants in the streets.
Enraged by the common girl's defiance, Margaret brands Isabella a wicked sorceress, burning her irreplaceable remedies and ordering her execution in the public square. Facing execution as flames lick her feet, Isabella refuses to plead, knowing royal guards are moments away from uncovering the horrified monarch's favorite child.
