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侦探们一整天都在机场等候，因为那架飞机晚点了。他们正期待着从非洲运来一箱珍贵的钻石。几个小时前，警方从某人那里得到消息，说有小偷会试图将这些钻石偷走。飞机一抵达，其中两名侦探就在主楼内等候，而其他侦探则在机场等候。一些人从飞机上取下包裹并将其带入海关大楼。当两名侦探在门口守卫时，其他人打开了包裹。真是令人惊讶，那些价值连城的钻石竟然被换成了一堆石头和沙子！
Detectives were waiting at the airport all morning because the plane was late. They were expecting a precious bag of diamonds from Africa. Several hours earlier, the police got some information from someone that thieves would try to take the diamonds away. As soon as the plane arrived, two of the detectives were waiting inside the main building while others were waiting on the airfield. Some men took the parcel off the plane and carried it into the Customs House. While two detectives were keeping guard at the door, the others opened the bag. What a surprise, the valuable diamonds had been replaced with stones and sand!