Best friends Laura and Sarah have done everything together since the age of five. Both married and with children of their own, they settle down comfortably to follow life's script - until Sarah's husband suddenly leaves her. Unable to bear the shame and humiliation, the once solid friendship bends under the strain and Sarah leaves her hometown to move to London, where she hopes to find herself. Years later, Sarah returns with a mysterious friend in tow. And just in time it seems - as Laura is about to go through a private hell of her own...a hell that's going to test her marriage, her friendship, and her inner strength in ways that she never imagined.