A family disappears in the dark of night . . . An old abandoned mansion suddenly has a "Sold" sign in the front yard after sitting vacant for over five years. A light in the attic glows every night, and Jimmy is sure he and Mortimer see a face in the window. But no one ever notices anyone going in or out. Things get even more mysterious when Lily's cat Muffin disappears, and an anonymous ransom note is delivered. Who is in that...