Sweden's queen since childhood, Christina has ruled her country well, but now feels pressure to marry a "suitable" man she doesn't love, and produce an heir. To escape her problems temporarily, Christina disguises herself as a boy and, with a trusted bodyguard, rides off to a rustic inn. En-route, she helps dislodge a carriage stuck in the snow carrying Spanish envoy Antonio (Gilbert). Meeting again at the inn, Antonio soon realizes Christina is no boy, and the two fall in love. This forbidden romance will only complicate matters back at court, and ultimately Christina will face some painful choices.