Twelve-year-old Lizzie Durango lives in a zoo, spending her days taking note of the animals' behaviors, then she meets runaway Tyler Briggs and together they investigate the wolves who are suddenly dying.
Max the duck, left behind when his flock migrates south for the winter, moves in with Irene and her animals. His behavior disrupts the house, but they're all sad when Max is gone.
Enzo, the dog of professional race car driver Denny Swift, recalls his memories of life with Denny and Denny's daughter Zoë and shares his insight into the human condition that he learned from observing his owner.