高中生Wendy(Mary Elizabeth Winstead饰)与友人一起去游乐场庆祝毕业,大家玩得十分痛快。游乐场内灯火璀璨,却诡异处处。在坐上过山车的座椅时,Wendy忽然看到了怪异现象,心生恐怖,男友Jason安慰她不过是幻觉。过山车开动起来,可是在半空中突然出轨,大家倒挂空中。Wendy眼看着朋友一个一个坠落死亡,自己也不能幸免于难。 被同学的吆喝喊醒的Wendy惊觉刚才不过是幻觉,但是她忧心忡忡,力阻大家离开过山车。虽然遭到大家的嘲笑,但是事后证明这是正确的选择。过山车就如同Wendy看到的一样出事了。 然而,逃过一劫的少男少女们并没有脱离死神的魔掌。他们接二连三地死去。Wendy发现这一切都与在游乐场的一张照片有关。为了生存,她开始了与死神的搏斗。When Wendy Christensen has a vision of an accident on the roller coaster, resulting in her and her friends' deaths, she instantly begins to panic and gets off the ride, causing a few of her friends to get off as well. The remaining friends, including Wendy's boyfriend, are stuck on the roller coaster and find themselves involved in the accident. With death waiting around the corner, Wendy and Kevin Fischer must try and work out death's plan, before they and the remaining survivors end up dead.