Taxi driver Vince McKee and his estranged wife Ros have blamed themselves ever since their son Tim cut ties with the family, and now they live separate lives. Vince's day-to-day existence takes an unusual turn when he accepts an offer from a criminal gang organised by his ex-con mate Colin, who has resurfaced after six years in prison. Although initially thrilled at becoming a driver for gang leader The Horse, once the criminals arrange their major job McKee soon wishes he could have his old life back.