Sixty-six year old Gertie Johnson and cohorts Cora Mae and Kitty have a knack for stirring up trouble in what was once a quiet backwoods community in the heart of the Michigan Upper Peninsula. When Finnish resident Harry Aho (sometimes pronounced A-hoe) takes a bullet at his kitchen table, Gertie suspects it has something to do with the public shooting range he set up right on the property line next to a Swede. The Trouble Busters bring out the big guns to crack this one, including deer cameras, a riot gun, and faithful Fred, the semi-retired police dog.