 Millionnaire Lionel Twain invites the five most brilliant private eyes to a dinner - and a murder. So, Sidney Wang from China, Dick Charleston from New York, Jessica Marbles from England, Milo Perrier from Belgium and Sam Diamond from San Francisco arrive at the remote castle. They are welcomed by Jamesir Bemsonmam, the blind butler. At nine, a dinner is supposed to be served. The five private eyes and their companionships are in the dining room, wondering what everything is about. Suddenly, Lionel Twain appears and lets the private eyes in on his plan: Exactly at midnight, a murder is going to take place. And he offers a million dollars to the one who can solve the murder. Then he disappears. Before long, a problem arises: The butler is found dead - and it s long before midnight! Will the five most brilliant minds of our time be able to see through the elaborate set-up staged by a criminal mastermind?