On a hike during a white-hot summer break on the Greek island of Hydra, Naomi and Samantha make a startling discovery: a man named Faoud, sleeping heavily, exposed to the elements, but still alive. Naomi, the daughter of a wealthy British art collector who has owned a villa in the exclusive hills for decades, convinces Sam, a younger American woman on vacation with her family, to help this stranger. As the two women learn more about the man, a migrant from Syria and a casualty of the crisis raging across the Aegean sea, their own burgeoning friendship intensifies, and when a simple plan of revenge goes horrifically wrong, Faoud must go on the run while the women come to terms with the terrible consequences they have set in motion.