Redford is a professional thief just out of prison after a four-year stretch, and he is immediately recruited for a job by his brother-in-law, Segal. They meet with Gunn, the ambassador of an African nation, who financially backs their attempt to steal a priceless diamond from a museum, a
stone he says rightfully belongs to his government. Redford and Segal recruit wheelman Leibman and explosives expert Sand to help in the robbery, but when the caper comes off, guards swoop down on Sand while he is holding the stone and he swallows it. Redford and Segal then go to Mostel, Sand's
father, who helps them launch an assault on the jail to get Sand out. The breakout goes...