When Emily finds a locked playhouse in the woods, she can't resist peeking through the windows. Inside, the walls are painted to look just like the surrounding woods, right down to an identical white playhouse with blue shutters. But the playhouse is not as deserted as Emily first thought. A girl Emily's age lives on the painted walls—and she's dying for Emily to join her!

Newbery Honor-winning author Marion Dane Bauer crafts an eerie story for young mystery lovers guaranteed to send shivers down their spines.