After a jewel robbery, which results in a brutal murder of an undercover detective attempting to infiltrate the gang, Richard Gordon, the nephew of Scotland Yard boss Sir Archibald, becomes drawn to the case.

Following a potential lead, Richard and his butler James encounter the enigmatic John Bennet, who lives with his son Ray and daughter Ella in an idyllic house in Landsmoore.

Despite all the warnings of his colleague Philo Johnson, Ray quits his job at the renowned newspaper publisher Maitland, and shortly afterwards finds work in the Lolita bar.

This dance and revue bar becomes more and more the focus of Inspector Elk's investigation when the suspicion becomes clear that it is a hideout for members of the frog gang.

Ray is mistakenly suspected of having shot Lew Brady, who was also part of the frog gang, in the Lolita Bar and is sentenced to hang.

With the help of a film camera that Gordon secretly installed in the bar, Ray's innocence can be proven and he can be saved from the executioner John Bennet at the last moment.

Philipsen acquired the rights for the movie adaption of The Fellowship of the Frog and The Crimson Circle from Penelope Wallace, with an option on other novels by her father should the films be successful.

A small team, including Reinl and his director of cinematography Kalinke travelled to London for two days to shoot some stock footage to be used in back projection.