When he learned that his days were running out, the old Count Hervey de Keroderon decided to hide in a secret niche and die there, just to annoy his heirs. As his body was not discovered, the latter will have to wait for five years until they can inherit the Earl's money. In fact, this is very frustrating because during this period, they were asked to keep the K é raudren estate. In order to raise funds, nephews and nieces organized a Son et Lumi è re performance at the estate while also busy searching for missing bodies. However, unexpectedly, they took turns being killed. Murder or accident? Jean Marie, his fianc é e Michelin, and his cousin Edwin conducted an investigation and ultimately successfully exposed the culprit. Moreover, the count's body was accidentally discovered and everything returned to normal.