The plot concerns Clouseau's infatuation with a wrongly accused murder suspect, and the chaos that develops from that unlikely situation. The film is filled with a degree of nuance seldom seen in a comedy, and is probably the best crafted of all the Panther films (although I have to admit that the way over the top "Pink Panther Strikes Again" is my personal favorite.) The physical comedy that Sellers could make totally natural (watch the "spinning globe" scene for an excellent example) is still unrivalled, and the nuanced interplay with other cast members is better than in any other comedy that I can think of (to see what I mean watch the "curved pool cue" scene and the interaction of both Monsieur Ballon and the butler.)
I highly recommend this film. The DVD print is good, though there are few extras (the original trailer is very amusing and a tad on the weird side.) It is slapstick, but it is very refined slapstick done by the master, Peter Sellers. If only they still made movies like this today. I give it five stars only because Amazon won't allow more!