As Easy as A.B.C

Two English criminals, Charles and Edward, are committing copy-cat robberies stolen from the plots of Jason's books, which causes the police to take an interest in the author after a security guard is killed. Jason and his girlfriend Arlene, have an encounter with the two villains and escape but, as they can now recognize the pair, they are in danger as they head for Venice, where a trap has been set for them.