On a grim winter day the central heating in their half of the building is down, so the colleagues hope to get the day off. However, repair men are ordered and the director's office is still heated, so they must wait there for news until clumsy Jomme gets on the director's nerves and everybody is thrown out. Then both coffee lady Arabelle and Jomme's 'black' strong box have been plundered. Versatenhoven conducts the official inquiry, while suspicions generally turn on doorkeeper Baconfoy, known to be in financial misery. After hours he, Jomme, Arabelle and Persez stay behind to catch the thief red-handed, with completely surprising results.
—KGF Vissers