To escape the chaos of London during World War II, young Elizabeth White is sent to live a safer life in the small Irish town of Kilgarret. It is there, in the crowded, chaotic O'Connor household, that she meets Aisling - a girl who soon becomes her very best friend, sharing her pet kitten and secretly teaching her the intricacies of Catholicism. Aisling's boldness brings Elizabeth out of her proper shell; later, her support carries Elizabeth through the painful end of her parents' chilly marriage. In return, Elizabeth's friendship helps Aisling endure her own unsatisfying marriage to a raging alcoholic. Through the years, they come to believe they can overcome any conflict, conquer any hardship - as long as they have each other. Now they're about to find out if they're right ...