Soviet intelligence officer Kraft has a new assignment. This time, acting under the name of engineer Grubbe, he must find and transfer to the center the secret drawings of a new submarine codenamed "Walter".
Михайло Голубович
as Василий Порик
Ольга Лысенко
as Станислава Добжанская
Борис Кудрявцев
as полковник Гресс
Юрий Дубровин
as Иван Васильевич, контрразведчик
