Michael Strogoff.

The Russian Czar sends his trusted confidant, Michael Strogoff, to warn his brother the Grand Duke of a Tartar rebellion that will be led by Feofar Khan and Ivan Ogareff. Calling himself Nicholas Korpanoff, Strogoff poses as a trader to journey to warn the Grand Duke. On his way he meets Nadia Fedorova, a young girl trying to join her father Wassili, a political activist who has been exiled to Siberia. Strogoff is captured by the Tartars, who don't believe he is a trader and threaten to torture Strogoff's mother Marfa unless he reveals his true identity.