Home from their latest Delaware crime-stopping adventures, Lily Gefelty and her friends Katie, Jasper, and Drgnan Pghlik face killer tarantulas and teenaged vampires when they try to rescue Lily's mother, who has been possessed by a menacing zombie that wants to take over the world.

As Lily, Katie, and Jasper try to return home after their adventures in Delaware, they face a protoplasmic monster, sleeping gas, a runaway rice cart, sentient lobsters, and spies of the Awful and Adorable Autarch of Dagsboro.