Joanna and Alistair travel from Scotland to Australia with their baby son Noah. They're going to Melbourne to see Alistair's mother Elizabeth and to fight for custody of Alistair's 14 year-old daughter Chloe, from his previous marriage to Alexandra.Joanna is struggling with life as a new mum and the flight to Melbourne is a huge additional strain on her. Noah cries the whole way, to the very apparent dismay of their fellow travellers.Exhausted and emotional from the journey the couple finally arrive in Australia, where unforeseen events change their lives forever.