During Spring Break, mystery lover Amy looks for clues to the disappearance of wealthy Ms. Sullivan's Saint Bernard puppy.

Liz is excited that her three best friends are visiting her family's cabin at Marigold Lake, but something seems to go wrong with every activity she planned.

Amy so looks forward to meeting her future stepsister, Chloe, that she is not prepared when Chloe first ignores her then is downright mean.

While her friends in the Critter Club babysit frogs, second-grader Marion enters a fashion design contest.

After winning the lead role in a play, acing a spelling test, and finding money, second-grader Ellie wonders if the Critter Club animal shelter's newest animal--a little pink pig--is bringing her good luck.

Ellie has always wanted to go to wedding, and her hopes finally come true when her cousin asks her to be a flower girl at her wedding. Then the Critter Club gets the cutest guest Ellie has ever seen: a little French bulldog. Ellie works hard to find a home for the puppy, but she's worried she won't be able to. Suddenly she has an idea that will guarantee that the puppy lives happily ever after!--

Taking a turn caring for the class pet hamster, Marion is devastated when the hamster goes missing and she receives an anonymous letter in her locker with clues leading to a mysterious scavenger hunt.

Liz is excited to start her class project of an animal habitat diorama, but finds that her new neighbor and classmate is too nosy.

Liz and her friends are spending a fall weekend at the cabin at Marigold Lake, planning to bake pies and enjoy nature, but Lizzie forgets to put sugar in her berry pie--a mistake which proves fortuitous when she needs a lot of berries to feed a migrating goose who has fallen behind his flock.

Marion volunteers at the Santa Vista Arboretum butterfly release and helps her younger sister Gabby overcome her fear of bugs so she can also attend the event.