Biographer Andrew Wilson, in his 2003 publication Beautiful Shadow: A Life of Patricia Highsmith claims the title is 'appropriate for the janus-faced, flux-like nature of her protagonists'.

In Athens, a private detective questions McFarland, who accidentally kills him during a struggle in his hotel room.

He helps McFarland and Colette hide the body and leave Athens under false passports procured by his friend Niko, a local street vendor.

Both MacFarland and Keener separately flee the scene undetected and take the same boat back to Athens, now more dependent on each other than ever.

Leaving behind all his possessions except his cash stuffed into his pockets, McFarland travels by taxi to Lyon and then on to Marseille, where he intends to depart for America.

It was written and directed by Hossein Amini, and starred Viggo Mortensen, Kirsten Dunst and Oscar Isaac.