An expedition sets out to explore a mysterious forest where the residents of a town all died. Many had frozen to death. Others were cruelly and mysteriously slaughtered. The bodies of the remaining citizens are still unaccounted for.
Hilary, a 17-year-old girl, gets into a fender bender shortly after attaining her driver’s license and innocently exchanges her personal information with an apologetic stranger, only to unwittingly become the next victim as the mysterious driver stalks her suburban home.
All the rules are broken as a sect of lawless marauders decides that the annual Purge does not stop at daybreak and instead should never end.