The detectives participating in Detective Camp accidentally find traces of a kidnapping in a cave marked "No Entry". Sensing something is amiss, the children thoroughly search the cave.. With the appearance of a suspicious man looking for treasure, the tense children forget their camp assignments and set out to solve the case.. The detectives find a large, unusual-looking bird's egg in a tree. The surprise is short-lived as they discover white smoke pouring out from behind a waterfall. Someone is clearly hiding inside the waterfall.. What exactly is happening here?