Kate is treating a woman who is driven to despair by her inability to conceive. The woman later has a row with her husband and storms off. A young couple called The Doubleday's baby then goes missing and the mother suspects her mother-in-law of the kidnapping and a manhunt is launched for the snatched baby. However Kate realises that her patient is probably responsible for taking the baby. The baby is eventually returned by some hippies who have moved into the area. Meanwhile Greengrass buys a racehorse and starts training it up and down Aidensfield's main street to the annoyance of Blaketon who tries to think of an offence to be able stop him, but can't!

A local woman is getting prepared for her wedding, but someone it seems is trying to sabotage the event. An old boyfriend of the woman's then turns up still expressing feelings for her. The church is then sabotaged and Nick and Kate find that the culprit for the recent acts of sabotage is the bride to be's old boyfriend. A old friend of Greengrass' turns up and passes on to him a load of stolen sea food, which Claude then sells to the bride's family for the reception, which gives the her father food poisoning. Meanwhile, Kate's aunt Eileen pays her a visit telling her that she has some money that her Uncle Henry had left to her in his will. Kate initially refuses it, which puzzles Nick. Kate later explains that when she was young she found her uncle in bed with another woman, and he then tried to bribe Kate into not telling her auntie. However Eileen tells Kate that she was aware of her husbands affairs and lived to accept it. Kate then accepts the money and donates it to charity in me

An American motor cyclist called Charlie, turns up at the police house having just had an accident. Kate, who has been forced to move her surgery to the police house temporarily, is able to fix him up. Nick is in bed with the flu and gets little time to rest. A local, Korean war veteran is angered when he learns that the American is a draft dodger, avoiding fighting for his country in Vietnam. This angers the veteran who then picks a fight with him in the pub. Then Charlie's bike gets damaged. Charlie fixes the bike and the war veteran then tries to force Charlie off the road, but he himself ends up in a ditch. Meanwhile Greengrass acquires a couple of classic English motor bikes, claiming he wants them for a regimental museum, but in fact sells them to Charlie. Gina who falls for Charlie is tempted when he offers to take her down to London.

Insp. Crossley suspects an old woman of being responsible for an attack of food poisoning, but Kate soon discovers it was due to something entirely different - arsenic poisoning from old wall paper. Nick points out to Blaketon that the Insp. hasn't been keeping CID fully informed which soon puts an end to his presence in Ashfordly. The police are also surprised to discover that their new Inspector is a woman - Insp. Merchison!

Nick and Kate's relationship is really put to the test. Nick is slacking in his work, whilst James that her quality of work has also reduced. Nick confides in Blaketon and James is there for Kate to talk to about their problems. Kate tells Nick she is pregnant but he is a lot more keen than she is and is upset when she suggests bringing up the baby on her own, because of their ‘unworkable marriage'. Kate ends up performing first aid on top of a church roof, and Nick is annoyed at her for taking the risk going up there, but she informs him simply that its ‘her job'. Later the situation is reversed when Nick arrests a man with a knife. In the final scene Kate tearfully realises the baby and their marriage is most important and is upset to think she may have ruined her and Nick's special time, but Nick comforts her, telling her everything will be all right and the couple make up happily.