The Tackleford gang is back with a new case that demands solving! When Tackleford&s derelict barns begin going up in flames Linton & Sonny are on the case with a moderately mysterious new friend Paths cross however when Lottie & Mildred meet a terrifying yet misunderstood creature living beneath a bridge! Throw in an overly enthusiastic fire brigade a transforming skate ramp & a new French teacher & you&ve got the kind of charming genius that can only be found in John Allison&s BAD MACHINERY