The story follows the titular monster as he discovers the existence of demons and their divine opponents, the gargoyles (earthbound guardian angles), the demons want the monster because, without a soul of his own, he's the prefect vessel for a higher-level demon. The Demons plan to capture the monster, figure out how he works and make enough to win their war with the gargoyles; not a brilliant plot, but about on par with similar horror/action/superhero films. There's a copy of Victor Frankenstein's diary rolling around for the sides to fight over and a bunch of disposable characters to provide the monster with some pathos. Probably the most fun I had watching was spotting all of the places they'd filmed in Melbourne, my home town; there is, of course, the Melbourne Uni car park that was featured in Mad Max, several famous laneways and the National Gallery of Victoria masquerading as "Central Station". I actually kind of like the "Central Station" as our main train station (Flinder's Street) is rather iconic and would have planted the film too much in Australia.
I, Frankenstein features a cameo from Australia's greatest living actor, Bruce Spence, but blink and you'll miss him. In researching this article, I discovered that I, Frankenstein is based on an indy graphic novel which I have never read but would be interested to see if it's better, or at least better written. As DC comics have shown for decades, the idea of the Monster walking around today and being heroic has some potential, it's almost a shame that Universal Studio's "Dark Universe" won't come to pass, I would have liked to see something like that tackle the Modern Prometheus. Not an essential watch, but fun enough whilst painting or whatever.