Gilmour has mentioned (as may be heard on the David Gilmour in Live performance DVD) that the track was written about his wife, Polly Samson.
The track is played in C major. It opens with a synth droning a C major chord, leading to a slow guitar solo performed with a clean sound. The first verse is then sung slowly over synth chords, before the main rhythm of the track seems, and the rest of the band join the arrangement. One other verse is sung, and followed by a guitar solo. After this guitar solo, the last few lines of the verse are sung again, after which a guitar solo is performed till the end of the track.