Xavier est un ancien militant d'extrême gauche passé au trafic d'armes et aux règlements de comptes. Monsieur Jean, pointure des services secrets, le fait libérer avec l'intention de l'utiliser pour infiltrer et neutraliser l'organisation fasciste clandestine Janus, dont Xavier veut se venger.
Propriétaire d'un bar près de Gibraltar et acculé par les dettes, Marc Duval se voit proposer par les douanes françaises de devenir un indic rémunéré dans le narcotrafic. Dès lors, il devient rapidement un jouet et se retrouve entraîné dans des affaires de plus en plus dangereuses.
De 1967 à 1969, Welles tourna l'adaptation d'un récit de Charles Williams à ses propres frais sur les côtes dalmates qui sera finalement joué sur deux voiliers et porté par seulement cinq personnes.
Having left the Army, reformed jewel thief and current detective Michael Lanyard (Gerald Mohr), or the Lone Wolf, returns to New York to find his lover Carla Winter (Janis Carter). On the way, he is tipped off by Inspector Crane (William Davidson) of the looting of the Shalimar, a diamond co-owned by the Prince of Rapur (Olaf Hytten) and Lal Bara (John Abbott). It is revealed that the jewel thief is Stonely (Don Beddoe), owner of a bar.
Bill Rogers (Dan Duryea), an American jet pilot, comes to England to find out why he hasn't heard from his wife lately. Upon his arrival, he learns that his wife has been murdered, and that he's the prime suspect. With only 36 hours at his disposal, Rogers takes it upon himself to track down the actual killer.
Vienna taxi driver Toni Sponer dreams of going to the US. One day, an American businessman is waiting for his cab, when jealous concert pianist Claude Manelli (Lederer) shoots him dead because he suspected him of having an affair with his American wife Karen (Camden). Toni grabs the dead man's papers and takes over his identity. Later he falls in love with Karen who initially thinks that Toni is the killer but he is able to convince her that he is innocent. Together they try to flee to America with Karen's husband in hot pursuit. Both men are finally captured by the police but Toni receives only a small sentence of a few months in prison. Karen decides to wait for him.
San Francisco ex-cop Vic Barron's (Stevens) family died and he himself was disfigured, framed and imprisoned when he crossed the wrong mobsters. After his release, Vic has but one desire, revenge on gangster Tino Morelli (Douglas Kennedy), whom he considers responsible.
1970s Marseille is ruled by a brutal drug gang importing morphine from Turkey, transforming it and exporting heroin to New York, called la French. The gang, led by the cold-hearted Gaètan Tany Zampa (Gilles Lellouche), is rounding up its incomes with extortion and robbings. Former Juvenile Court judge Pierre Michel is transferred to organized crime, but finds out that la French's crimes are difficult or impossible to prove and that the police unit investigating heroin trade under Captain Aimé-Blanc has nothing relevant to report.
Newlyweds Paul Lester (Ireland) and his wife Nancy (Randolph) are invited to visit Paul's friend Ed Stevens. They arrive to find Stevens gone and a mysterious phone call gets Paul to the other end of town. While he's away, Nancy is assaulted by a would-be burglar. Paul thinks there's something more going on than a missing persons case or a burglary and tries to interest Police Detective Frontelli (Leonard) in looking into it, but Frontelli is initially skeptical. When Stevens turns up under the wheels of a truck along with evidence tying him to an earlier hit-and-run murder, Paul is certain that there's some kind of organized conspiracy afoot. What he finds is a town slowly coming under siege from a secret band of anti-Semitic thugs masquerading as a patriotic organization, with whom Stevens had been involved and tried to quit. Paul and Nancy's situation goes from bad to dangerous when they accidentally stumble upon evidence that could hang the murderers.
James Nevill, a nearly bankrupt businessman, hires his best friend to kill him so his wife can collect on his life insurance. After his business takes a sudden upswing he changes his mind, but he must get to the killer and tell him so before the killer gets to him first. Nevill suffers several near misses before learning that it is partner and another who really want to kill him, not his friend whom they have kidnapped and framed. In the end, the villains shoot each other.
David Barrett, the co-owner of a dog-track, discovers that his partner has sold out to gangster Frankie Edare (Stevens) who plans to take sole control of the track and wants to get rid of Barrett. His problems are just beginning, though, as he finds himself involved with Jessica Warren who, unknown to him, was involved in a hit-and-run accident and is trying to set him up for the crime. When Edare kills Barrett's ex-partner to frame him, Barret is falsely accused of committing two murders. Mayhem ensues when the police arrest him, but justice eventually prevails.
After being badly wounded during a heist, bankrobber Charlie Blake (Wilde) takes refuge in a remote New England farm house owned by his older brother Fred (Duryea). Fred reluctantly harbors the fugitive and his two gang members. Time passes and Charlie's men are anxious to move on, but he needs rest to recover. He is also still in love with Freds wife Elizabeth (Wallace) with whom he once had an affair. More trouble ensues when it is revealed that the Elizabeth's son was fathered by Charlie, not her husband.
Artist Trevor Stevenson (Meeker), an emotionally scarred World War II veteran, is on honeymoon in Acapulco with his bride Stella (Rule). Shortly after their arrival, two women are murdered. The audience is presented with clues pointing to Trevor's guilt or innocence depending upon one's point of view.