When the gang go on an adventure in search of the Beanotown Yeti, Walter follows with plans of his own for the rare beast, and Dennis and his chums must come to its rescue.

The world famous Wonder Sausage is on show in Butch Butcher's shop. Walter realises the sausage has a strange hypnotic effect on Gnasher so uses it to make him perform his every whim! Dennis can't understand why Gnasher has turned against him and has to use all his heartfelt pleas and happy memories to try and win Gnasher back.