Casting the first stone

"A year after her husband's death, young widow and art collector Di Porteous listlessly roams the beach near her home. Her friend and agent Saul takes action, introducing her to his stylish, anarchic sister to pep her up. They plan that Di should rediscover her talents as a thief, as well as an art expert, to recover stolen works of art -- and begin with the neighbour's son, who is amassing paintings in a strange building in London, including wor...