Twelve-year-old Nell Stoker loves animals. She's been working toward becoming a junior volunteer at her local animal shelter for what feels like forever. But now it's summertime, and her parents are making her go to her Aunt Jerry's old bed and breakfast in Deer Valley with her older sister Lulu. When Nell crosses paths with the Netherbeast (a creature that is decidedly not a cat), his hijinks leave her wondering if she's made a new best friend or if Netherbeast will destroy the whole B&B (not even by accident). It's up to Nell to help save her aunt's B&B and solve the mystery of what might be in the basement. Between the mysteries of Rose Cottage and the creepy Netherbeast--Nell is in for an unforgettable summer adventure.