Sweeny Todd

I never saw the show; and I either don't know or don't remember what it's supposed to be about. So I thought it would be funny to write down what I think it's about, drawing from articles, reviews and promotions that I don't fully remember. Here goes:

Sweeny Todd is a ghost barber who tries to be both funny and horrible by teaming up with his daughter, the other ghost barber, for music and mischief.