High-school student Wendy Christensen visits an amusement park for a McKinley High senior-class field trip, along with her boyfriend Jason Wise, her best friend Carrie Dreyer, and Carrie's boyfriend Kevin Fischer. As they board the Devil's Flight roller-coaster, Wendy has a premonition that the hydraulics securing the seat belts and coaster cars will fail during the ride, killing everyone on board. She panics and a fight breaks out, and several people leave or are forced off the ride including Kevin, best friends Ashley Freund and Ashlyn Halperin, alumnus Frankie Cheeks, athlete Lewis Romero and goth couple - Ian McKinley and Erin Ulmer. Moments later the roller-coaster derails and kills the remaining passengers, leaving Wendy devastated.