It's New Year's Eve 1999. Y2K is expected to end in chaos: planes falling from the sky, elevators plunging to earth, world markets collapsing. A digital apocalypse. None of that happens. But at a Blockbuster Video in New Jersey, four teenagers working late at the store are attacked. Only one inexplicably survives. Police quickly identify a suspect, the boyfriend of one of the victims, who flees and is never seen again. Fifteen years later, more teenage employees are attacked at an ice cream store in the same town, and again only one makes it out alive. In the aftermath of the latest crime, three lives intersect: the lone survivor of the Blockbuster massacre who's forced to relive the horrors of her tragedy; the brother of the fugitive accused, who's convinced the police have the wrong suspect; and FBI agent Sarah Keller who must delve into the secrets of both nights—stirring up memories of teen love and lies—to uncover the truth about murders on the night shift.