Having already stolen two from the set of three priceless Napoleon Diamonds, expert jewel thief Max Burdett decides to retire on a tropical island with his girlfriend and partner-in-crime, Lola. Fate intervenes, however, when Max discovers the third and final diamond is sitting on a docked cruise ship on his very island. It should be a simple job, but FBI agent Stan Lloyd shows up to make sure Max doesn't get any ideas.