While on holiday in Sri Lanka, Sarah Latimer meets the charismatic Greg. When he rescues her from a fire, she is unsure if her growing attachment to him is love or indebtedness.
Sarah befriends Ruth and takes a room in her dilapidated guesthouse, and quickly becomes aware of the brutality Ruth suffers at the hands of her husband. Sarah decides to help, ignorant of the dark secrets which have long been simmering beneath the surface of her own life.
When Sarah receives devastating news from England about her son, Tom, she agonises over whether or not to fly home, but a shocking act of violence eclipses everything and she finds herself driven to take action in a way that horrifies her.