The old hotel, perched on a cliff, exudes mystery. The Fire Wheel, once a haven for pirates and smugglers, attracts the attention of the police. It's all because of an advertisement placed in newspapers. The descendants of the late innkeeper gather together to uncover the secret of the secret room. But the double murder leaves everyone in shock. The investigation by the official authorities does not bring any results. And only the intervention of Maude Silver helps solve the mysterious crime...