A stolen antique! A bright red baggage car from Spence's antique circus train is missing! Zoe's mission, if she chooses to accept it, is to find the thief. Her reward: the honor of becoming Lieutenant of the Northern Spy Club. Zoe's suspects include: a reclusive neighbor, Juniper Boomer, a couple of Clowns, Tulip and Hackberry, who are in town with a visiting Circus, and a monkey who really likes the color red. Zoe begins her investigation and finds that this puzzle is one of the scariest adventures the Northern Spys have ever tackled.