Colm’s debut full-length play was staged in the Axis Theatre as part of the 2018 Dublin Fringe Festival and was nominated for the Fishamble New Writing Award. Directed by Mark O’Brien, the one man show starred Eric O’Brien as Craner, a man grappling with impending fatherhood, with lighting by Suzie Cummins. For Saoirse is a frenetic adventure through history, memory, space and time, from Ballymun to the Rotunda and back again.

In reviewing the show for the Irish Times, critic Donald Clarke wrote:

‘Keegan has addressed staggering wads of the (Ballymun’s) past and present – early tenements, the towers signalling to arriving planes, homeless families now housed in hotels – in a busy odyssey that rarely takes an expected turn. James Connolly makes an appearance. Ghosts tag the protagonist at every corner. Well worth travelling up (as he dubs it) the Champs-Élysées of Craner’s youth to see. Unless you’re already there.’