The Pink Panther diamond has been stolen again and Inspector Clouseau (Peter Sellers) is called in to find the thief. Christopher Plummer has taken over David Niven's role as number one suspect, but this time he is innocent and decides he'll have to find the culprit himself if he wants to avoid a life behind bars. Clouseau, meanwhile, conducts the police investigation in his idosyncratic style.

The Pink Panther diamond has been stolen again and Inspector Clouseau (Peter Sellers) is called in to find the thief. Christopher Plummer has taken over David Niven's role as number one suspect, but this time he is innocent and decides he'll have to find the culprit himself if he wants to avoid a life behind bars. Clouseau, meanwhile, conducts the police investigation in his idosyncratic style.