Blythe enlists the pets to retrieve her new favorite necklace that fell inside a vat of batter used for filling a huge cupcake order with Youngmee. This proves difficult for them, when they discover the order was placed by Fisher Bisket for his twin daughter's "quarter-birthday" party.

Blythe accidentally starts a new fashion craze with her wild "Nest Hat", inspired by a nest that lands on her head. To her shock, she finds an unhatched egg laying inside of it. The pets are chosen to take care of the newly hatched chick using their animal instincts, while Blythe tries to find the chick's mother. However, her plans fall in the hands of the Biskit twins, holding her hostage while trying to exploit her new-found fame.

After losing a ball while playing catching, Minka and Penny Ling try to retrieve it when it rolls into a natural history museum. Blythe tries to retrieve the two without losing all the other pets, but finds out that the museum disallows animals. She conceals the rest in her bags and backpack, but as she spots the two that were missing, Zoe flees from her bag upon inspection from the museum's security guard. Now with three of the pets missing, Blythe must manage to find them all, eventually losing the rest in the process: Sunil and Vinnie in the taxidermy section, and Russell in a supply closet.

Penny Ling is excited to meet the host of her favorite show, but becomes upset when the host is afraid of her. Now Blythe must find Sunshine Sweetness (voiced by Kathleen Barr), a purple gorilla, so that she understands why Tess is afraid of pandas and gorillas.

Blythe and Zoe spend a weekend at the Biskits' winter chateau, while the pets try to cheer up a homesick penguin.