Forensic psychologist Alexandra Belliveau is en route to Luxembourg City to attend her mother's funeral. The joie de vivre from her childhood had since been beset by hapless events linked to the mother's career as a French counterintelligence agent and, before that, a member of the Maquis, the French resistance during the war. At the funeral reception, Paul Bernard, her first puppy love from decades past, introduces himself. Also present is a stalker bent on killing Alexandra for associations her mother once had. In addition, there are foreign agents focused on keeping Alexandra alive until they obtain an ingenious code her mother had developed during the Cold War. Alexandra and Paul are in a quandary – who can they trust?