A golden retriever named Bessie is suffering seizures and the vet team traces the problem to the dog's liver. The owners must cope with their beloved dog's fatal illness. While student Suzanne Smith is on the ER shift, a cocker spaniel arrives that's eaten a whole bag of nachos and a bottle of his owner's vitamin supplements. One of the clinic's resident veterinarians is assigned to the case of a constipated cat with a potentially serious bowel obstruction. A young horse is rushed into emergency after she impaled herself in the groin with a metal shaft.