Was ist los im Zirkus Beely? (1927)

Harry is pleased to see an old friend of his return from America, but the latter is murdered before they can meet. The victim just has time to phone him from the Beely Circus he just bought. Harry therefore goes to the circus to find out more, but the police take him for the murderer and he must cunning to find out who the man in the mask is lurking behind the scenes.