Bob finds JJ playing with his new model aeroplane. Bob then heads to Mrs Percival's and starts to knock out the old fireplace - the fastidious Mrs Percival has covered her old furniture in dust sheets. Meanwhile JJ travels into the countryside to try out his plane, but he loses control of it and it careers off into a neighboring field where Spud discovers it. JJ abandons the remote control to look for the plane, and Spud finds this too. Thrilled, he uses the plane to dive-bomb Squawk, but he breaks the remote control and the plane spirals off towards town. Spud gives chase and passes JJ, who joins in the pursuit. The plane narrowly misses Wendy who is replacing some ridge tiles on Mrs Broadbent's roof, then heads down Mrs Percival's chimney just as Bob finishes work. The plane's wings are smashed and the room is covered in soot. They dash outside to find a guilty Spud and a breathless JJ. Bob offers to mend the plane for JJ while Mrs Percival ropes Spud into helping clear up her house.