Eva offers to babysit for little brother Baby Mo so her parents can go to a sky-dancing competition, and she enlists a couple of her friends to help--unfortunately Mo proves to be a handful, eating too much candy, making a big mess, and throwing a tantrum, and she and her friends have to clean up fast before her parents get home.

Eva Wingdale and her owl classmates are on a camping trip to the other side of the forest, where one of the assignments is to make useful inventions--but Eva and Lucy become totally distracted by the legend of Nellie Wingdale, founder of Treetopolis and her buried treasure, and never finish their project.

Eva is very excited about a beach vacation with her family and best friend Lucy, but her secret fear of swimming where there might be hungry sharks could keep her from finding the legendary mermowls.