Soviet spy Ladeynikov learns that in one of the pharmaceutical centers in a small resort town works a former German war criminal, Dr. Hass, who is finishing the creation of a deadly chemical gas RH development that he began during World War II, experimenting on POWs. Since Ladeynikov doesn't know Dr. Hass's appearance, Soviet intelligence recruits an actor, Ivan Savushkin, who, during the war, escaped from a prison camp where Hass was testing his gas. Together, they must identify and stop him before he finishes and unleashes his weapon of mass destruction.
Donatas Banionis
as Konstantin Ladeinikov
Ролан Быков
as Ivan Savushkin
Бруно Фрейндлих
as Valery Petrovich
Геннадий Юхтин
as Muravyov
Jüri Järvet
as Professor O'Reilly
Сергей Курилов
as Pavel Bocharov
Ants Eskola
as Smith
Einari Koppel
as Drayton
Владимир Эренберг
as Professor Born/Hass
Світлана Коркошко
as Ellis
Leonhard Merzin
as Father Mortimer
Anda Zaice
as Katherine
