Fourth grade crime fighter,  Jo Schmo, is ready to fight more crime after defeating Dr. Dastardly in Book #1, but “the bad guys must be taking a break…It happens.”  So Jo invents a time machine to travel back to the California Gold Rush of 1849, where outlaw Wyatt Burp is causing havoc with his Hole in the Head Gang. (They wanted to be the Hole in the Wall Gang, but that name was already taken.)  Jo and her sidekick dog- Raymond track Wyatt Burp down as he and his gang head out of town on a stolen sailing ship. Whenever Jo gets too close Wyatt burps them out of the way. Finally, Jo outsmarts Wyatt by replacing his sarsaparilla, which is Wyatt’s key he his gigantic powerful burps, with Raymond’s dog drool. That done, Jo flies Wyatt off to jail. Not wanting to stay in 1849, she and Raymond travel back to the present.