After being quite successfully stitched up for the theft of the priceless "Pink Panther" diamond four years earlier, it falls to "Insp. Clouseau" (Peter Sellers) to find out just who has stolen it again now! He reckons it must be his nemesis "Sir Charles Litton" (this time Christopher Plummer) because his trademark glove has been left behind, but we know that that former jewel thief is also just as perplexed by the thieving since he didn't leave his poolside. Curious, he decides that he, too, is going to investigate just what is going on and that provides us with the template for this…