Diego is one of the chief of the spanish Communist Party. He is travelling back to Paris (where he lives) from a mission in Madrid. He is arrested at the border for an identity check but manages to go free thanks to Nadine, the daughter of the man whose passport is used by him. When he arrives in Paris, he starts searching one of his comrades, Juan, to prevent him from going to Madrid where he could be arrested by Franco's police...

In a mid-sized metropolis (population 500,000) in a right-wing military led country, a pacifist organization, which supports the opposition party in the government, is planning on holding an anti-military, nuclear disarmament rally. The organization's charismatic leader - the deputy - is scheduled to arrive in the town from the capital the day of the rally. Beyond the problems arranging the rally due to the probable incitement of violence at such a rally, the organization learns of an unconfirmed report that there will be an attempt on the deputy's life. The rally does happen, after which a three-wheeled kamikaze runs over the deputy, who eventually passes away from his injuries. The official report is that the incident was a drunken accident. In reality, the deputy's death was murder orchestrated by the secret police, the general for who likens the pacifist organization to mildew killing off agricultural crops...

Caracas, Venezuela. Just after her engagement with Vittorio, Nelly runs away from him. As he pursued her, she looks for help to Martin, a French middle-aged man she met by accident. He helps her to escape and drives her to the airport and gives her a plane ticket to Paris. Then he thinks he can go back to his peaceful lonely life on his island. Of course, he is wrong and will be bothered again by Nelly...

American Grand Prix driver Pete Aron is fired by his Jordan-BRM racing team after a crash at Monaco that injures his British teammate, Scott Stoddard. While Stoddard struggles to recover, Aron begins to drive for the Japanese Yamura team, and becomes romantically involved with Stoddard's estranged wife.

In the South American jungle supplies of nitroglycerene are needed at a remote oil field. The oil company pays four men to deliver the supplies in two trucks. A tense rivallry develops between the two sets of drivers and on the rough remote roads the slightest jolt can result in death.