For some strange unknown reason, every loaf of bread in Busytown is hard as cement! Huckle and his pals finally solve the Mystery of the Unbreakable Bread by determining that the Brick Layer making a new brick over in Humperdink?s Bakery accidentally mixed his bags of cement with Humperdink?s bags of bread flour. On the outskirts of Busytown, the center line on the road suddenly goes twisty. It confuses drivers, causing them to veer off the road. It turns out the driver of the line painting truck is allergic to daisies and during his sneezing episodes, he unknowingly drives his line painting truck erratically.