An Englishman has been working in the US so long he now speaks with an American accent. He is drafted into the British Army during WWII but is injured and loses his memory. Because he talks like an American, the doctors repatriate him to the States where he is housed with a New York family. After the war they all travel throughout Europe, searching for the women he still remembers in the hope of restoring his lost memory

Both Scotland Yard and an amateur American sleuth are tracking a master criminal known as The Frog. This moniker refers to the bulging-eyed mask worn by the evildoer, and is reflected by the frog icons painfully tatooed onto the forearms of his henchmen. The trail leads to the country manor of an enigmatic, steely-eyed nabob, whose repressed son has eyes for the artistes at the Lolita cabaret, and whose lovely daughter captures the fancy of both the American playboy and the villain himself. Murder, kidnapping and seduction ensue.

A man who owns a diamond importing business goes out for a night on the town with his girlfriend, her brother and her brother’s fiancé. The group stops by a circus to see the act of a trapeze artist who’s a friend of the man’s girlfriend. The performer suggests that all the men go out for a few drinks, and the next thing the businessman knows, he’s waking up in his apartment with a terrible hangover and a dead body in his room.

The frenzied reporter Lilli is just great: she shoots with both hands and lays her opponents with Jiu-Jitsu while the guys fall to the ground with just one look from her! Now she is to attend a missionary convention in Sicily. Nothing special? The apparently routine job develops into a murder case.

Ed Martin witnesses a murder at the hotel. Although the perpetrator is caught, he had previously taken papers from the victim's bag that prove a criminal connection between politicians and gangsters. The murderer's silence is bought with his release. But as the case has stirred up too much dust, a new perpetrator has to be found: Ed Martin, who witnessed everything. Beaten half to death, he confesses to the crime, but later recants. In the meantime, he has also found friends who want to defend him. Then he is found dead in his cell. The police who hanged him claim suicide.

In the Danish port city of Belgesund, the caretaker of a private high school has fallen victim to murder. Detective Thomsen takes on the case and finds that behind the clean facade there are abysses. He has five suspects in mind: the teacher Berling, who is having a relationship with a student, the twin brother and sole heir of the murdered man, the murdered man's shady roommate, the primary school teacher Klaus Erikson and his brother Jakob.

A car factory in the GDR. During a test ride there is a major accident. One driver is dead, another is seriously injured. The investigation reveals: sabotage.

Lashing rain, thunderstorms, fog and a godforsaken, eerie train station: the mood among the six travelers who have to wait for their connecting train here in the middle of the night is extremely tense. In keeping with the gloomy scenery, the station master also tells his involuntary guests the story of the ghost train ...