Douglas Fairbanks made this film between Zorro and The Three Musketeers, and it would be the last time in the silent era he would play such a part.
Charlie Jackson (Fairbanks) is an inventor of things that either don't work exactly right or have limited usefulness or can't be easily reproduced on a mass scale. The film really isn't about him being an inventor though, except when one of his inventions - an automated fireworks display - blows up in a novel fashion and ruins a party he is having for the girl he loves, Estrell Wynn (Marguerite De La Motte). Estrell is devoted to her absurd theory that taking slum kids out of their environment and into "refined homes" for an hour each day will cause them to grow up to be good citizens with no further intervention required. Naturally, this is a real estate intensive theory to work out in practical terms, so Charlie tries to help Estrell in ways that backfire and anger her and cause her to put her trust in the owner of an illegal gambling house who has dishonorable intentions.
There are no big laughs in this one, and it seems at times that Fairbanks' character is trying to emulate Buster Keaton. Fairbanks has his character relying on quick thinking more than physicality and acrobatics. There are some interesting devices, such as shots making it appear that Fairbanks is climbing through the heating vents of the villain's gambling house in order to both ellude police and rescue the girl, and having either a devil or an angel shown as a switchboard operator connecting to Estrell depending on whether it is the gambler or Fairbanks attempting to call her.
This is probably much better than other comedies of the period, even if it is not up to Fairbanks' earlier work. It is therefore worth your time if you are interested in either Fairbanks' body of work or silent film in general.