The rich widow Madame Collie leaves the fortune to her lost niece Maria Ivanova. Two cousins of Maria go from Paris to Moscow in order to search her. They have to find a 17 year old girl with the birthmark on her right shoulder. The documents of the heiress are hidden in her doll.

Three reporters and an office girl are trying to stop a bacteriological strike by some powerful western business leaders against the USSR.

In a capitalist country, workers are heavily repressed but manage to get a "death ray" to fight back. (A part of the movie is lost.)

Natasha and her grandfather live in a cottage near Moscow, making hats for Madame Irène. Madame and her husband have told the housing committee that Natasha rents a room from them; this fiddle gives Madame's lazy husband a room for lounging. The local railroad clerk, Fogelev, loves Natasha but she takes a shine to Ilya, a clumsy student who sleeps in the train station. To help Ilya, Natasha marries him and takes him to Madame's to live in the room the house committee thinks is hers. Meanwhile, Madame's husband pays Natasha with a lottery ticket he thinks is a loser, and when it comes up big, just as Ilya and Natasha are falling in love, everything gets complicated