Nineteen-year-old Vera Kall cycles home through the night. She arrives at a farm, leaves her bike and sneaks quietly in through the door. She enters the kitchen and doesn't even have time to notice that she's not alone.
What is a human life worth? How is it possible that a woman like Agnes could agree to kill another human being? Is it the money? Or are there other forces at play?
In 2007, Gillian Wearing placed an advert – in newspapers, online, in job centers, and elsewhere. It read: “Would you like to be in a film? You can play yourself or a fictional character. Call Gillian.” Of the hundreds of people who replied, seven – chosen through an extended process of...