PC Bradley and PC Ventress are forced off the road by a blue lorry. They locate the lorry at the house of Tom Lowson, his new bride Mandy and teenage daughter Sandra. PC Ventress, who is acting sergeant in Craddock's absence, is convinced that Lowson is up to something, because he was the biggest black marketer in the North Riding area during the war. To prove it he orders his colleagues to inspect Lowson's lorries whenever they get the chance. Meanwhile Sandra is having a bad influence on her friend Alison Hartley, who is certain that she is pregnant. Sandra arranges for Alison to have an abortion, but the girls are late for the appointment and steal nurse Bolton's Land Rover. Faith Trueman is ill and ask her friend Greengrass to sell a valuable Georgian clock and other stuff for her so that can stay at the same hotel, where she and her late husband spent their honeymoon, once more before she dies. Only the stuff is not nearly as valuable as expected.