Robert Castle is writing a history of Tiffany's (Purtell did -- you might remember) when he meets Jennifer and when he is forcibly made to participate in securing a ten million dollar canary diamond for one of those rich Greeks which leads to some razzle-dazzling nonsense all around New York with other expensive accessories. Granted that Robert and Jennifer are likable; granted that the tone is cheerful under the circumstances; granted that you've a head that will accommodate a 128 carat rock (actually one called Tiffany is on display). . . it's overexerted.