Summary:Frank Sinatra plays a private eye,who has a Miami houseboat. His former partner asks him to help him get rid of a drunken girl found alone in his hotel.
Tony returns the daughter,Diana, to her father, who decides he wants to hire Tony to find out WHY she was drunk and alone, and to find out what she does.
Then, his daughter(Sue Lyon)hires Tony to find her diamond pin that has been stolen.
Sinatra gets to do all this with the help of a sexy man-hungry woman(st.john)Blackmail and deceit are abound in this funny, black mystery.
rest of cast listed alphabetically