A Chinese scientist takes a plane to the United States of America to warn that China has the atomic bomb. On the way, however, the plane is intercepted by the Secret Service and shot down, falling over Italy. The scientist, who was saved, is later taken to his destination by a secret agent, but with much difficulty.

Three young girls hitchhike to St Tropez on vacation. During the trip, they meet three boys, and split up to go on different adventures. One with a journalist, one with a daddy's boy and one with a black jacket.