Porridge the Tartan cat (it's a long story involving a tin of tartan paint!) has been framed! Someone is sabotaging Isla and Ross' attempts to reunite Groovy Gran's band, the Tattie Scones, and Porridge is the top suspect. Only he knows the real villain is a dastardly dog – the Dug o' Doom. Will the Tattie Scones ever rock again? Can a balloon-riding, wool-chasing, saucer-flying tartan cat stop the crafty canine and clear his name?