Winter, 1916: In St Petersburg, Russia on the brink of revolution. Outside the Smolny Institute for Noble Young Ladies, an English governess is waiting for her young charge to be released from school. But so are the Tsar's secret police... Beautiful and headstrong, Sashenka Zeitlin is just 18. In the evenings when her mother is partying with Rasputin and her dissolute friends, Sashenka becomes Comrade Snowfox and slips into the frozen night to play...