I struggle with plot and it seems several other aspiring authors do too. It's definitely unethical to steal an existing plot but is it ILLEGAL in the sense of plagiarising? The author of Twilight has admitted to stealing the plot of Romeo & Juliet (Shakespeare himself stole this plot from an ancient myth) and the author of Bridget Jones' Diary has admitted that the plot for the book is basically Pride & Prejudice for the 21st Century. So if a plot is OLD enough, it's fair game to borrow, right? Does anyone know the law around this, things like public domain?