When Matt Saunders meets Jenny Johnson, he believes he has found the perfect girl. However, he decides to break things off with her when she becomes too needy, controlling, and jealous. Jenny doesn't take the breakup very well and decides to get back at him by using her superpowers. It turns out that Jenny is really a superhero named G-Girl. Meanwhile, Matt and his co-worker, Hannah start to have a romance with each other which sends Jenny over the edge.