Anna discovers her step-brother's secret project: a giant, hairy spider named Tula, which terrifies her. Anna loves her new home, but the basement, where her step-brother Hal lives, is a source of dread. Hal, a genius, has been secretly working on an enormous, hairy spider named Tula. Anna is petrified by the monstrous tarantula and must confront her fear to coexist with it in the house.

The premise sets up a classic children's horror-fantasy scenario where a protagonist must overcome a significant fear. The narrative focuses on Anna's internal struggle with her phobia of spiders, personified by the enormous Tula. The inclusion of illustrations suggests a visual storytelling component aimed at younger readers. The story likely explores themes of acceptance and confronting the unknown, framed within a domestic setting.