Sue Ann is a loner who keeps to herself in her quiet Ohio town. One day, she is asked by Maggie, a new teenager in town, to buy some booze for her and her friends, and Sue Ann sees the chance to make some unsuspecting, if younger, friends of her own.
For three longtime friends, a camping trip turns into a night of terror and insanity when one of them tells the story of a mysterious creature called La Mimica.