Jay is a normal teenage girl whose life is disrupted when she has sex with her boyfriend Hugh and learns she has been cursed. Anyone who has sex with her will pass the curse on, and the entity following her, referred to as "It", will kill her and move on to the next victim. Jay and her friends attempt to repair the situation by trying to find and kill It, believing they succeed when It appears to die in an electrocution. However, the film ends on a cliffhanger as Jay and her friend Paul see someone following them down a path, leaving the audience unsure if It has truly been killed or if the curse continues.