The trio of adventurous pals, a man who is a scientist, a fine lady and a former military pilot are in the Indochina jungles looking for some mysterious vase that holds a metal container that is of no mundane origin.
Girls no more, four heroines emerge into womanhood with a more clear-eyed outlook on life.
Sonia is pregnant with her lover Mirek. Alfred, an elderly Swiss businessman, married to Sonia, does not like the situation. He orders two tough guys to persuade the two lovers.
