This dark and moody cut was included on the soundtrack of the third Twilight movie, Eclipse. Florence Welch explained to The Independent June 11, 2010 why she wanted to be involved. "I thought it would be something fun to do; I'd never written a song for a soundtrack before. It's an interesting exercise as a songwriter. You're thinking about it more in a visual tone and imagining a film score, which I think is really exciting. They didn't specifically say what bit of the movie it was going to be in or anything, but they did say it should have nothing about vampires or werewolves in it. I don't think they wanted anything with specific references to the story; it's not a musical, opera type thing – they just wanted something that fitted the emotional tone of it. I just thought about some of the themes in the book and wrote the song."
Florence told The Independent that she is a fan of the Twilight books. "My sister and I read them to each other last Christmas. It's pure escapism. We get really excited for the films, they're fun."
Welch was unaware of the huge demand to be on the Eclipse soundtrack. When told how many bands submitted songs for it, she gasped, "No way, really? Mental. They wouldn't tell us for ages if it was on. I did the song, they said they liked it and then only at the last minute did they say it was included."