As the worst storm of the century breaks across the North West sweeping through Snowdonia & across the Mersey to burst upon Liverpool two women Molly & Ellen give birth to girls in a Liverpool maternity hospital. Despite their different backgrounds they become firm friends. Molly lives on a hill farm in Snowdonia while Ellen is married to Sam OMara a dock worker who is quicker with a punch than a kiss. After one punch too many Ellen throws her husband out & eventually leaves Liverpool to live with Molly in Snowdonia. Ellen & her daughter throw themselves into their new life with enthusiasm unaware that they are being watched by someone hiding in a ruined cottage higher up the mountain. & as another horrendous storm breaks across the hills the watcher makes his move.