Thanks to a mysterious combination of events, a dog named Sophie travels from the year 1926 to the present, where she follows a boy Sam home from school. Through a bit of sleuthing, Sam and his outspoken grandfather Horace discover the old neighborhood Sophie has apparently come from. With Sophie's help, Sam travels back to 1926 to meet Sophie's owner, another 11 year-old named Rollie. The two boys discover they have a lot in common including the notorious Cheesebro gang that has terrorized their city of Enterprise in both time periods Together, the new friends hatch a plot to stop the corruption, crime, and blight that has afflicted their city and pave the way for a brighter, revitalized future.