When Tyler, a 17-year-old teenage boy receives a letter asking him to meet behind the school, he doesn't think much of it.
When the mysterious girl who goes to the same school is there and asks him out, he declines (he has a crush on his best friend since 3rd grade). The girl gets angry with him and reveals herself as a deadly vampire.
Instead of killing him, though, she starts the process that turns HIM into a vampire. And you can't forget the spell that she adds that turns him into a girl.