After setting her serial killer boyfriend, James Lincoln Fields, the "Rain Ripper" on fire, a paranoid delusional woman, named Mary, gets a job at a 24-hr gas station.

Mary tells her childhood friend, Debbie, that her boyfriend would call her on the phone whenever it rained and play "Raindrops" by Dee Clark, and would thereafter or during, murder someone.

Going to check, she finds Debbie's drivers license in the bowl and then the toilet fills with blood and arms break through the wall behind her attempting to grab her, but it is just another hallucination.

Bobby returns to check on her and she tells him her story of how she found the dead girls in her basement, and how James kept her prisoner, forcing her to watch him kill his victims.

Bobby then leaves, but his truck breaks down, and whilst trying to fix it, he is struck on the back of the head with a hammer by the hooded assailant.

James ties Mary to a chair and forces her to watch as he brutally caves in Tom's skull with a sledgehammer and then suffocates Debbie with a plastic bag, he douses Bobby with petrol and just as he is about to immolate him, the trucker from earlier returns, and he calls the police when he notices signs of a disturbance.

Mary is able to free herself and unties Bobby, who tells her that a fellow employee keeps a shotgun in his locker, she is able to retrieve and load it, and they wait for James to return in order to kill him.