In Senghenydd, 1905, Anwen eagerly anticipates the birth of her first child.
In Cardiff, 1939, Mary passes her final nursing exam.
Anwen and Mary are witnesses to Welsh history in the making: the religious revival, the Senghenydd Mining Disaster, evacuations from Dunkirk, the Cardiff Blitz and the birth of the NHS. They meet as patient and nurse at Pen Y Fal Hospital, building a friendship bound by a traditional Welsh nursing shawl.
Siôl is a play about strength, resilience, and how compassion, caring and humour hold us in the darkest times.