There's no such thing as "a regular day" at Denver's Planned Pethood Plus veterinary clinic. For 80,000-plus clients and their pets, the clinic and its maverick vet Dr. Jeff Young represent one last hope, and possibly the difference, between life and death.

A cat with a shattered paw needs Dr. Jeff's help to walk again. Dr. Baier treats a rescued opossum in need of a new home. And the team heads to an Indian reservation in South Dakota, where a badly injured dog steals Jeff's heart.