Rex-Film Bloemer & Company, Berlin

A serial killer is on the run, after escaping a mental institution. He befriends a woman and her child, but the urge to strangle women with red necklaces still haunts him.

The captain Paul Heider enjoys the reputation of a Danube Casanova.

"Gems" - Embedded in a frame story, the film shows excerpts from 18 entertainment films of the time, among others, "The Gypsy Baron", "The Three Codonas", "La Habanera", "Viennese Blood", "Sophienlund", and "Mask in Blue".