Flashman finds out about a serum, discovered by an English doctor, which make people invisible. Kid take possession of a serum before Flashman does and makes himself and Helen invisible in order to wrest money from an influential emir. The timely interposition of Flashman has the stolen money recovered; but the emir is killed. This is a ghastly Italian science fiction with a rambling and not clear plot. Flashman who has his base in London, goes in to action with an absurd dressing-up: a mantle like the one of Superman and a mask like the one of Batman. But these two respectable strip cartoons carachters and Flashman have nothing in common. In fact Flashman, is an odd and clumsy character and in some scenes he is taken with an accelerated speed. This film is played by secondary actors, hidden under false American names. I think this is the worst film of its genre. There are some Italian production like "agente 007 dall'oriente con furore" and "rapporto Fuller base Stoccolma", which are an imitation of 007 English films: although they cannot compete with them, they are better than this one. Although the lenght declared by IMDb is 96 minutes, the commercial DVD lasts 89 minutes.