As the worst storm of the century sweeps through the mountains of Snowdonia and across the Mersey, two women, Molly and Ellen, give to girls in a Liverpool Maternity Hospital. Molly and Rhys Roberts farm sheep in Snowdonia and Ellen is married to a docker, Sam O'Mara, but despite their different backgrounds the two young women become firm friends, though Molly has a secret she can share with no one.