The vehicle drifts across the center-line, its speed pushing 70km/hr. As it races downhill, the rider hangs on. Metal screams and rattles, and small wheels struggle to grip the pavement. Welcome to the picture-postcard community of North Vancouver, where local bottle pickers have turned the act of binning into a thriving subculture of shopping cart racing. Murray Siple, a former snowboarder and sport film director injured in a serious car accident ten years ago, returns to filmmaking to capture their story in the documentary Carts of Darkness.