Based on the novel by Jules Verne "Drama in Livonia". French aeronaut Jules Ardan, traveling in a hot air balloon, accidentally finds himself in Reval. Here he meets Dr. Peterson and his daughter Leida. The gendarmes are hunting for Leida's fiance. The banker's son is being murdered in the city. Suspicion falls on Peterson. Jules Ardan takes over the investigation of the crime.
Сергей Юрский
as Jules Ardan
Марина Неёлова
as Leyda
Vytautas Paukštė
as Peterson
Владимир Разумовский
as Vasily Yakovlev
Bronius Babkauskas
as banker Schmidt
Jaan Tooming
as Carl Schmidt
Ants Eskola
as investigator Myagi
Станислав Соколов
as Captain
Valentīns Skulme
as valet Trankel
Lembit Eelmäe
as Innkeeper Grimm
Анатолий Васильев
as Yan