
Professor Grant signs a contract with Dr. Selin for the sale of his invention of cold light with the plans for his invention being kept in Grant's apartment. The negotiations are secretly heard by the illusionist Durk, who wants to seize the invention. A few days later Selín is found dead, killed by a light bulb filled with poisonous gas. Durk performs at the birthday party of Grant's daughter Anna and seizes the plans for the invention.

as Professor Oskar Grant

as Anny Grant

as Ing. Milan Bell

as Dr. Karel Selín

as Durk, the Magician

as Ferdinand Kardan

as Martin Bálek

as Baron Evans Margus / Servant

as Jan

as President of Police

as Reporter

as Grant's Assistant

as Hall

as Selín's Companion

as Gatekeeper

as Seance Guest

as Seance Guest