A small town infestation of crawling alien foreheads that begin attaching to people and taking them over collides with a scientist's experiments to extract foreheadazine and things go horribly horribly wrong.
When ancient parasites rise from beneath a small town, taking the most fearful and susceptible as hosts, a young trans filmmaker finds herself the only one who can sense the possessed, and rally the resistance before the horror escapes and spreads.
Two estranged siblings go to their late scientist father's farmhouse to make sense of his incomplete work. They soon discover an evil entity, buried in time and space for millions of years, has been released and begun wreaking havoc.