Two bungling brothers-in-law are hired by an African ambassador to steal a priceless diamond from the Brooklyn Museum so it can be returned to its country of origin. However, no sooner do they have the gem than they manage to lose it, and face a race against time to retrieve it. Crime comedy based on the novel by Donald Westlake, starring Robert Redford, George Segal, Ron Leibman, Zero Mostel, Paul Sand and Moses Gunn.

Dortmunder and his pals plan to steal a huge diamond from a museum. But this turns out to be only the first time they have to steal it...