The mission - if our three can-do Women in Black choose to accept it - is to prise the girlies in grey off the sofas where, frankly, they look bored rather than laid-back and cool.

And then?

Well, the clue is in the title: Code Butterfly - as winningly put together by Christine Devaney's Curious Seed company - is all about breaking out of drab habits, spreading wings and trying new things.

Which is exactly what the girls from local youth centres in Granton and Leith have done by joining in an ambitious dance-theatre adventure that boldly goes where I doubt any other project has gone in the Drill Hall.

For, once aerialist Jennifer Paterson has swung into action, abetted by dancers Skye Reynolds and Jillian Thomson, everyone is off on a journey through doors and passageways, up spiralling stairs and down, into dusty rooms. En route, determined wee figures burst out of hanging chrysallis-pods and test their aerial skills. The lower depths reveal what seem like trapped spirits, pounding on the walls as if longing for freedom.

On the stairs, grim-faced individuals out-stare us, glowering as if we were intruders disturbing their peace. We fetch up in the Wish Corner, where pens and paper invite us to participate in writing our anonymous wishes.

Watching the closing sections, when the new-fledged butterflies dance back, you just have to wish that Code Butterfly were only the beginning for all those involved. Going by the girls' comments in the programme, they're definitely up for more - at next year's Leith Festival, perhaps?

From Friday's later editions.