It is Christmas morning in 1964. For nurse Fionnuala Kennedy, it is work as usual. As she trudges through the cold streets to catch her bus, Fionnuala thinks of the secret which she has been keeping from her beloved mother and father - and of how on earth she is going to break it to them. She promises herself that she will do it that very evening, when she gets back home. None of the hospital staff are expecting very much to disturb their routine - it is Christmas Day, after all. And indeed, Fio