Jim Brannigan is sent to London to bring back an American mobster who is being held for extradition but when he arrives he has been kidnapped which was set up by his lawyer. Brannigan in his American Irish way brings American law to the people of Scotland Yard in order to recapture this mobster with both a price tag on his head and a stuffy old London cop to contend with.

Stanley Ford leads an idyllic bachelor life. He is a nationally syndicated cartoonist whose Bash Brannigan series provides him with a luxury townhouse and a full-time valet, Charles. When he wakes up the morning after the night before – he had attended a friend’s stag party – he finds that he is married to the very beautiful woman who popped out of the cake – and who doesn’t speak a word of English. Despite his initial protestations, he comes to like married life and even changes his cartoon character from a super spy to a somewhat harried husband.