Trying to save the life of a badly injured, much-loved cat, James and Tristan seek the help of Granville Bennett, who runs a small animal hospital. The fruits of Bennett's practice are clearly much richer than the hard graft of the Dales, and James is intrigued to find that Bennett is looking for a partner.

Harvest Sunday proves to be a trying time for the practice. Seigfreid seizes the opportunity to teach Callum cleanliness by example, forcing him to watch "the perfect operation" on a sick cow. Unfortunately, the operation doesn't go according to plan. When Callum is chased by a bull, James goes to his aid.