He's old and impudent, she is at a certain age but still a dish. They work in London Diamond, as cold and heartless an outfit as any you are ever likely to encounter, and they are both due for the sack.
Makes sense to pinch a few diamonds does it not? Well, then consider that the vault holds two tons of diamonds. Yep, two TONS. All this behind a monstrous slab of a steel door, security cameras, and one exit via personnel lift. Besides, how would you sell the bloody things once you'd pinched them?
Oh yes, one other little conundrum, why is the old feller bothering to try?
Twist after twist, lie after lie, trick after trick; all adding up to a flawless movie.