This song is featured in the Kevin Costner movie Robin Hood: Prince Of Thieves, where it plays over the end credits. It was written to order for the movie, initially by American film composer Michael Kamen, with the middle eight, break, outro and arrangement added by Adams and producer Mutt Lange. Adams used a line in the movie, "I do it for you..." as the basis for the song, and they had it written in about an hour.

There are no specific references to Robin Hood: Prince Of Thieves in the lyric; the song quickly became dissociated from the film and far more popular. The song finds Adams pouring out his devotion for a girl, letting her know that their love is worth dying for. He knows if she looks into her heart, she will know it's true. In the wrong hands, this would be terribly cheesy, but Adams can deliver this sentiment with total conviction, even if it was written for a movie.

Adams said that initially, this song didn't meet with Hollywood approval, as the film company wanted the song to have instrumentation in line with the film's era - lutes, mandolins, and the like. The film company relented, but still buried the song midway through the credits, apparently unaware of the huge hit they had on their hands.