World War II drama about covert organisation Lifeline helping allied airmen escape after being shot down in occupied Europe, working with the Resistance and hiding from the Gestapo.

The Belgian linguistics professor Matthias is going through a difficult period in relations with his girlfriend Anne. She is French, he is Belgian, and, oddly enough for an enlightened Europe and a doubly enlightened university environment, this small difference is a shadow on the couple’s personal life. One day, during a train ride, Anne disappears and Mathias goes looking for her in an unknown city.