A delicious, creamy substance is discovered bubbling out of the earth and quickly becomes a nationwide sensation as a calorie-free dessert known as "The Stuff." However, the sweet treat hides a terrifying secret: it is a sentient, parasitic organism that eats its consumers from the inside out, turning them into hollowed-out "Stuff-ies." When a corporate spy and a young boy team up to expose the truth, they find themselves in a race against time to stop the global marketing machine before the entire world is consumed.