A captain, a well-known flying ace, is developing his own device which will make a notable contribution to the prestige of his country's air force. One evening he occasionally meets a girl who strikes him with her mysterious behavior. In fact, he witnesses some completely inexplicable events that...
The explorer Smith leaves with Laura, a beautiful but naive girl, in search of Professor Berti, who mysteriously disappeared in Africa in the midst of one of his researches.
