Buffoon Stewie Brannen, an old friend of Siegfried's, has invited the distinguished Professor Norton to a black tie dinner, and prevails upon Siegfried to host it at Skeldale -- and lend him a dinner suit. But disaster looms when Siegfried and Stewie are called out for a calving, in full evening dress, and James has to hold the fort with an irascible Mrs. Alton.

Siegfried is determined to discover who shot Korean War veteran Jacob Pearson's dog. The suspect is Captain Crawford's willful and surly 20-year-old son, Hugh -- a young man with problems beyond his pompous father's control. Both James and Siegfried have extraordinarily little success in extracting payment from wily farmer Dennis Pratt -- until they discover he may be sneaking his cows onto a neighboring farm to enjoy better grazing.

Siegfried takes a close friend to task for wasting his own talents as a veterinary surgeon. Ewan Ross -- "the best horse man north of the Humber" has let his career slide gently into the whiskey bottle after the death of his wife. But Siegfried is determined to make use of his considerable skills. A valuable racehorse with a strangulated hernia could provide Siegfried with not only a way of striking back at "vets in Bentleys", but also putting Ewan on the straight and narrow. James, meanwhile, is strangely reluctant to take on responsibility for Mrs. Pumphrey's beloved Tricky-Woo when she announces that she is off to France. But Siegfried caves in under the persuasive skills of Mrs. Pumphrey and Tricky-Woo moves into Skeldale.

Siegfried is laid up at Skeldale with his foot in plaster. His dreams of mouthwatering meals prepared by Mrs. Alton are soon shattered by her regime of a strict diet "for an invalid". Tristan falls for the dark, sad-eyed beauty, Angela Mortimer, Mrs. Pumphrey's great-niece, who has been jilted by her fiance. Fortunately, the demanding dog Tricky-Woo provides an ideal excuse for Tristan to make a number of house calls. James impresses three hero-worshiping locals with his cow-curing abilities, and he learns to value their support when he has to judge the Darrowby Vegetable Show, with disastrous results.