A serial in six parts by Michael Pertwee.
[Starring] Anne Crawford, John Bentley

In answer to an advertisement, Richard Williams, an unemployed ex-RAF officer, is hired to smuggle a suitcase to Dublin under the false name of Sean O'Donovan. Before the plane takes off Richard has a change of heart and decides not to go through with the job. The plane crashes, and the police tell reporters that Richard is dead. Very much alive, and wanting to remain that way, Richard learns that his gangster employers now want to kill him.
During a gun struggle, Richard kills one of the crooks by accident. With the police and the smuggling gang searching for him, Richard enlists the aid of Diana Wilson, a newspaper reporter. They each make their way to Dublin independently, only to find that the other passengers from the original plane are in the city too.
During a conversation between them in Diana's room, the telephone rings and a mysterious caller makes it clear that he knows that Richard and Sean O'Donovan are one and the same person. It must be one of the other passengers - but which one?