Beautiful high school senior Wendy would have had a perfect graduation if she and her school friends hadn't stepped into the thrill ride roller coaster - a high-speed roller coaster. As the group prepares to board the roller coaster, Wendy suddenly has a strange premonition of a horrifying accident that will happen to her and her friends. Terrified, Wendy demands to get off. Some others also disembark with her. And Wendy's premonition becomes reality. The ride suffers an accident... But that's just the beginning, as all those who were supposed to be on that ride are now facing each day with accidents that could unintentionally or randomly take their lives... Wendy and Kevin, a surviving friend, must figure out how to save themselves and warn others. Not to mention, Wendy's younger sister is also on that fateful high-speed train.