It's Christmas in Thirsk, but the vets cannot join in the celebrations until they have tended to their flock. A cow has collapsed on Chris's farm leading Peter to fear the worst, Barney the spaniel may have to have a leg amputated and a piglet named Tiny Tim needs some urgent care. When things settle down, Peter and Julian have the honour of switching on Thirsk's Christmas lights.

Skeldale vets Peter and Julian catch up with old friends and tend to some new cases. Peter returns to the Greensit brothers' farm to tend to their 15-year-old brood mare Caysue who needs urgent attention, Julian revisits an alpaca who was born breech, and Julian calls on Squeaky the swan to see if she's been lucky in love.