Just after the Aldens arrive for the opening of The Game Stop, someone robs the coffee shop at the end of the mall where Queenie's new store is located. Raina, the young woman who works there, is accused and fired on the spot. But Queenie, who knows Raina, hires her. Is Queenie making a mistake? Strange things continue to happen. Letters disappear from the sign at the entrance to the mall. Eventually Queenie's store and the nearby jewelry store are robbed. Could it be Raina after all? Maybe, but there are more suspects to investigate, including Queenie's friend Carter, a Wordmaster champion. The Boxcar Children get busy trying to solve this latest puzzle.