While on her way to meet with her friends at a flash mob, Blythe gets trapped in the dumbwaiter along with Zoe, Pepper and Minka. While Penny Ling tries to attract the attention of the boys to get them out from the dumbwaiter, Zoe and Pepper start to fight, and within their compact space, Minka's claustrophobia is triggered.

Youngmee's Aunt Christie opens a confectionery store adjacent to Littlest Pet Shop, and the pets meet pet Buttercream Sunday, a hyperactive rabbit, who invites them to overindulge themselves on the sugar-filled treats located in Christie's pantry.

Vinnie accidentally falls into a dumpster while trying to catch a fly and is transported to the dump, where he encounters a rat that helps him get back to the pet store. Blythe contracts the common cold and can no longer understand the pets, so the pets try to cure her.

When Blythe gets accepted into the junior program at a fashion school, she, along with her family and friends from school and at Littlest Pet Shop, have to bode with the anxiety of her leaving.

Blythe must trade in her scooter for a sales kiosk in order for her to enter enter the International Pet Fashion Expo. Meanwhile, Roger's airline launches a "Pet Jet" service, with the pets using it to launch one of their largest fantasies yet.

Slow business prompts Mrs. Twombly to shoot a commercial for Littlest Pet Shop.

Roger takes Blythe and the pets to a camping trip in search of Bigfoot.

Blythe stresses over the upcoming International Pet Fashion Expo when she is asked to do a photo shoot for Très Blasé.

Arguing koalas wreak havoc at the pet shop; meanwhile, Brittany ignores Whittany after she scores higher marks on a test.

Blythe meets another young lady at the thrift shop and dismisses her old companions; Vinnie becomes friends with an arachnid.

Blythe must race against time to make her dream of having a Pet Fest a reality.