1936. Devastated by the death of her brother Hugh, Emma seeks to keep his memory alive by embracing his dreams of a communist revolution. But when she marries an ambitious diplomat, she must live within the confines of embassy life in Paris and Nazi Berlin. 1979. Emma's grandson, Phil, dreams of a tour of Europe, but is nowhere near being able to fund it. So when his beloved grandmother determines to make one last trip to the places she lived, and to try to solve a mystery that has haunted her since the war, he jumps at the chance to accompany her. Their journey takes them to darker, more dangerous places than either of them could ever have imagined…