Sinatra's PI, Tony Rome, shrewdly uses verbal parry and thrust instead of muscle to clear things up. It's a showcase for the actor, without a tuneful song in sight. Plot-wise he's got to figure out where an expensive diamond pin went and where the heck bad guy Nimmo is. Along the way, there's a lot of scenic Miami Beach and bikini clad skin, mainly Jill St. John's. But what grabbed me was the innuendo, intentional or not. Catch the brief scene with Mrs. Schuyler and her repetition of a lost pussy. That exchange with Rome is simply dropped in, and has nothing to do with the plot. Perhaps it was included on a dare. Tellingly, there're other, albeit passing, innuendos, as well. After all, this was a period when the counter-culture was taking hold and the repressive Production Code was all but dead.
It's also a good chance to catch a number of Hollywood vets in supporting roles, especially noir icon Richard Conte as a cop. All in all, it's a smoothly done (Gordon Douglas) eye- catcher. Moreover, the high-key Technicolor is about as far from classic gumshoe noir as possible. Happily for Sinatra the actor, it's a restrained showcase. Just bring your note pad to keep up with the tricky plot.