Kathryn Johnson's life is at a standstill. Stuck in a lacklustre marriage, the spark that once burned so brightly within her has since been snuffed out by the monotony of the everyday. Returning to England after many years of living in Ireland, she is shocked to discover a familiar face on the side of the road one dark and stormy night. But a person can't just reappear like that. Not when they've been dead for twenty years. Uncovering long-buried memories of first love and its devastating loss, Kathryn returns to the past to see if she can rewrite her present. But love divided by time is a complicated equation to solve.