For Zac Zap, a boy with spina bifida the wacky adventures continue. In this second book, adventure finds Zac Zap. His bustling city introduces the trolley and with the help of the friendly trolley driver, Mr. Wes, Zac and his wheel chair explore like never before. When he and Mr. Wes foil a robbery, the local head of Acme Trolley fire Mr. Wes in spite of his heroics. The replacements trolley drivers are indifferent to Zac's condition and incompetent. Zac becomes a loss boy when he is mistakenly put in a mail car and sent west hundreds of miles. A series of mishaps has him working for the rail company, driving a bus, and arriving in the town of Smartinville on the bayou Teche just in time to help his friend Amy participate in the Great Big Canoe Race. Amy, who has Down syndrome and Zac must out-paddle and outwit the competition, bears, a swamp monster, hidden traps, and villains galore.