Scarlet Dawn

When Russian revolutionaries overrun his country estate, Baron Nikita Krasnoff (Douglas Fairbanks, Jr.) barely escapes with his life by killing one of them and switching clothes. His story is suspicious, so the household servant Tanyusha (Nancy Carroll) is found and brought to identify him. To his surprise, she does not betray him, and they are released. He is even allowed to "loot" one of his own possessions, a sword with the fabulous Krasnoff pearl necklace hidden in a secret compartment in the scabbard.