Following a robbery in a circus, a young mobster, Jean, is arrested by Inspector Borelli. The thug denies involvement. To compel him to sign a full confession, Inspector Muller encourages the suspect to get married for - he says - to move the jury. This being done, he lets Jean believe that he can spend a moment alone with his wife; but then, Inspector Borelli blackmails him: "If you sign your confession, you can spend a moment with her." After being beaten, Jean signs a confession. It is then t...