In this addition to the Iowa Children's Choice Award nominated series, Warren and Betsy travel back to the Johnstown Flood of 1889 to save a survivor's young sister and help fulfill her dreams. Warren Spalding and Betsy Tyler have been assigned to do a paper on the Johnstown Flood of May 31, 1889. This time they've decided not to use the Instant Commuter time-travel device... It's just too dangerous. After all, they nearly died on two...