Determined to help the effort, female Russian air pilot Valka signs up to join an all-female aviation group, but as the war intensifies she has to decide how much she is willing to risk to defend the skies she calls home.
In 1905 czarist Russia, an impoverished country girl Elena and the aristocratic Ekatrina meet and set in motion an escapade that includes mistaken identity, a monk locked in a tower, a prince traveling incognito, and the witch Baba Yaga.