Inseparable friends Ginny, Ham and PC are perpetually looking for new adventures in a city that is too quiet for them. One day, Ginny meets her mysterious grandfather Essen for the first time. Her grandfather has a secret: he is the last of the Food Wizards, who are magical warriors that save the world... with food. However, he is not the only one to have returned, there are also Toxins, the metabolic monsters that reproduce in people's bodies when they eat incorrectly. Grandpa Essen needs help to counter their every attack and Ginny, Ham and PC transform into his warriors, entering the human body and fighting the Toxins with the right foods.