The singer once explained to the BBC this song is about a young woman being from the forest and arriving in a big city, unable to adapt completely. So she feels so isolated, hence the name "Isobel", Björk said...

So she hides back in nature and trains these moths to send emotional spirits towards urban people...

The video is an illustration of that feeling:

Björk - 'Isobel'

One of the songs of the moment...

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'Isobel'
Directed by Michel Gondry.
Written by Björk/Nellee Hooper/ Marius De Vries/
Sigurjón Birgir Sigurdsson (aka Sjón).

Published by Universal Music Publishing Ltd/Warner
Chappell Music Ltd/19 Music/BMG Music Publishing Ltd.
® 1995 BjörkOverseas Ltd/One Little Indian Records Ltd.