Engineering student Petteri and retired captain Jere Renkonen arrive in Terijoki as guests of architect Matti Marras at the villa he has rented. In the midst of everything, the owner of the villa, Russian émigré prince Asatiánts, arrives with his niece Darja. Petteri eavesdrops and learns that the prince is expecting a "man from Marseille" at the villa. This man is supposed to take a secret document hidden in a large cabinet in the hall across the border to Moscow, containing information about the hiding place of the prince's family jewels.
as Prince Svjatomir Asatiánts
as Darja, the prince's niece
as Miss Lily, Darja's companion
as Matti Marras, architect
as captain evp Jere Renkonen
as Petteri, engineering graduate
as vääpeli Mehto
as General Velikov, "the man from Marseille"
as Pjotr
as mies Marseillesta nro. 2
