Pretty classic : a angry woman grows to giantess size (if not more), and destroys everything to revenge herself. Like the sentence said : "it's in old jars that you do the best soups". So your story has potential to please, and with me, it worked. I wait the sequel, to see if like I said, Isabell will kill and destroy Vienna. It would be sad that a city as rich in history as the Austrian capital city disappear from the world. But that's your story, have fun to destroy it, I'm just laughing of my own joke about Vienna.