Chief of Police Bruno Courrèges investigates a thirty-year-old cold case after a facial reconstruction of an anonymous skull reveals a potential lead. His inquiry quickly uncovers a web of secrets involving a reclusive vintner, Henri Bazaine, who was declared dead decades ago and has ties to a menacing Cold War-era Communist organization. As Bruno navigates political intrigue and diplomatic tensions, he must uncover the truth behind Henri's past and the murder, all while the French countryside battles a severe drought.