At an elite private school, a new teacher, Miss Novak, forms a close bond with five students. At the request of their parents, she introduces them to new eating habits and a more mindful approach to consumption, but her influence gradually deepens. The students form an exclusive Club Zero, a secret group whose members decide they can stop eating altogether in order to change the world. As parents and school authorities begin to realize something is wrong, they must figure out how to stop the group before it goes too far.