Heartbeat Detector (French: La Question humaine) is a 2007 French film directed by Nicolas Klotz and starring Mathieu Amalric.
The film centers on Kessler, a psychologist in the human resources department of the French branch of a long-established German firm. The firm has recently dismissed 50% of its workforce on criteria devised by Kessler. Rose, the vice-president of the company, requests Kessler to look into whether Jüst, the CEO is fit to do his job. The CEO discovers Kessler is investigating him and tells him that Rose, whose previous name was Kraus, has a Nazi past.
Kessler then discovers that Jüst's father headed a Nazi extermination group on the Eastern Front during World War II. Jews placed in the back of a closed truck were killed with the truck's exhaust gas. A device called a 'heartbeat detector' was then applied to discover any who had survived. Tormented by this memory Jüst attempts suicide.
The action then shifts from the company's politics to the Holocaust. An...