In this next adventure, George and Gracie travel back in time to Hershey, Pennsylvania—1907. Their mission: to return an antique rug and rescue their parents. When the time machine lands them smack dab in the middle of a barn, George turns into . . . something pretty weird. And Gracie drives a car into a fence. They meet Milton Hershey, the chocolate king, who invites them to be his chocolate tasters. But when George and Gracie discover a plot to steal Mr. Hershey's perfect—and secret—chocolate recipe, they put themselves in danger to stop the thieves. Meanwhile, the evil villain, Crowe, is two steps from catching them and their time machine—and he's closing in!