Izzy and Jack are excited when their father's experimental 'growth promoter' made from pig stem cells produces giant vegetables. Things go rapidly wrong when the nasty Mr Clarence Grossman owner of the Gutso Sausage factory decides to steal some to try and make giant sausages. He tricks Izzy and Jack into trying some and they are transformed in pigs along with their father. However, Mr Grossman also trys some and ends up as the biggest, fattest pig you've ever seen. He ends up in the back of the Gutso factory van with all the slimy, squidgy, yucky food waste destined for his own factory. Can he be saved in time?