Young May went to Nice with a heavy heart: she had to improve the relationship between her parents and her fabulously rich grandmother. Having barely settled into the house of a quarrelsome old lady, the girl discovered a bloody knife in her suitcase... Tired of puzzling over this frightening discovery, May turned to her recent compartment neighbor, Baroness Amalia Korf, for help. She didn’t know: Amalia is a former secret agent of the Russian emperor. The baroness had already left the special service, but the story with the knife interested her extremely: there was a weapon, but there was no murder! Amalia suspected that someone wanted to plant evidence not on a fellow traveler, but on her, but the suitcases got mixed up. Which means it’s too early to retire...