Harry Peel is a bestselling novelist adored by women. But then, a criminal whom he once turned over to the police and whom he immortalized in his novel attempts to assassinate him. The attempt fails, however, and the gangster is back behind bars. However, Harry soon finds himself with another problem on his hands: he must help a friend with crushing debts by finding him a wealthy bride.

A black envelope presents the hero, detective Harry Peel, who loses his fortune over the course of the story, with tasks. A mysterious criminal, car and motorcycle chases through the wintry Alps, and the blowing up of a bridge provide cinematic spectacle and opportunities for daredevil stunts.

A German scientist designs and builds a machine that will do dangerous work instead of placing humans in jeopardy. But the machine itself turns out to have disastrous effects on the people involved.

Jonny Wilken is an ageing lion trainer in a circus. He is in love with his younger colleague Jutta Sarris. On her wedding day, Jutta's favorite Bengal tiger attacks her out of jealousy and kills her. Jonny, full of pain and out of revenge, enters the cage to kill the animal with his bare hands. However, the tiger bows to him without any resistance.

1945 film by Harry Piel

Harry Piel plays Harry Peel who receives an urgent telephone call from a friend who has returned from South America recently. The call is being made from the circus "Beely" and our hero arrives there too late to prevent the murder of his friend. Now Harry must find his friend's killer and go on a strange mission involving a hidden document.