Postman Harry (Neil Dudgeon) is the hero of the hour when, on his rounds, he saves Roisin (Maria Doyle Kennedy) from dying during an asthma attack. There's an undeniable spark between the pair, which is more than there's been between Harry and wife Kathy (Eva Pope) for a long tim, despite them celebrating their 20th wedding anniversary. But any temptation to stray is nipped firmly in the bud by a car accident which puts Kathy in a coma and leaves Harry and their two children distraught. Kathy's accident poses more problems than simply medical ones – not least when Harry finds unsigned love letters and anonymous illicit texts on her phone.