After the upheavals of the past year, her father hopes that Nadezhda will stay with him, but the captain wants to return to work and new adventures. So when a friend invites her to a wedding in Prussia, Nadezhda Ogon’-Dogonovskaya immediately agrees. No one expected that on the train she would meet an old acquaintance right away. However, upon arriving at the bride, they discover that she disappeared the day before the wedding—leaving only a crystal slipper. Where is the friend? Did she run away, frightened by the changes? Was she kidnapped? Or did she become part of someone else’s scheme?