Willa's usually gloomy friend Evelyn gets a new pet spider and cheers right up, until the little spider hitches a ride home in Willa's backpack; and doesn't want to leave Willa and her happy critter family; Willa has to help Evelyn bond with her.

To improve his soccer skills, Dooley joins Willa's dance class, but dancing is not as easy as he thought; after an argument, Steve and Edie break up the act; Steve's new partner Samuel becomes an unbearable showbizzy bore.

Willa and Dad want to have some father-daughter time together, but the insecure animals don't to want give up Willa; for a school sponsored Career Day, Willa spends a day in the veterinarian's office.

Thinking they've injured Sara, Willa and her animals wait on the cool chicks; but when Tiny discovers Sara is faking, Willa looks for ways to trick Sara into revealing her lie; after a soothing slumber, Bert is wide awake day and night.

When Dad wakes up with a cold, Willa decides to take charge and help her Dad get well; Sara, Kara and Lara see Dooley innocently giving Willa some flowers.

When Mr Tremble comes to the house, Willa and the animals whisk the naturally-nervous Tremble around, doing things Willa thinks are fun without considering what he likes; Willa tries outrageous ways to grow faster.