19th century. A self-taught inventor nicknamed Levsha is recruited to help investigate a mechanical flea found in the chambers of Aleksandr III.

A Russian missile submarine disappears without trace during a secret mission in the Greenland Sea. A vessel is deployed to search for it, ...

1899, the Christmas-time St.Petersburg. Ice-covered rivers and canals of the capital seethe with festive activities. On the eve of the new ...