Lissa is a home healthcare nurse in London, England. She witnesses a hit-and-run killing a boy she knows and suffers PTSD from the incident. Cormac is a home healthcare nurse and army veteran who lives in Kirrinfief, Scotland 500 miles from London. Lissa's supervisor arranges for a work exchange between the two to give Lissa a few months in a less demanding job so that she can recover. Each finds living and working in the other person's environment difficult at first and sharing texts about patients and situations helps them to adjust. After some time they begin to find aspects of the other's world that they enjoy. Both feel a connection to the other and would like to meet. Things don't go as planned as they face the challenges of being 500 miles apart but the tragedy that first brought them together helps them to finally meet face to face. Finding peace and healing from traumatic circumstances is a theme in this book.