Alderney, Channel Islands. 1964. A telephone operator ends up being the pivotal piece of a drama unfurling which puts professional integrity, and relationships, to the test.

Sheltering beneath the streets of London, the company of a West End play find themselves isolated from their loved ones when a nearby terrorist attack cuts short their final night performance. Minds racing over past anxieties from the run, they contemplate life-and-death decisions within the claustrophobic confines of the theatre basement.