In an 1980s-inspired post-apocalyptic world, a bacteria outbreak linked to gluten and MSG has decimated the population. The survivors now face a terrifying new threat: half of humanity has transformed into cannibalistic, deranged clowns with a hunger for destruction. Amidst this brutal landscape of blood and horror, a lone female warrior emerges. Armed with a blade, she journeys through the wilderness, rescuing those she can while pursuing the clown responsible for her parents' deaths: Happy Jack.