In 1990s Scotland, a group of Catholic school girls get an opportunity to go into Edinburgh for a choir competition, but they're more interested in drinking, partying and hooking up than winning the competition.
A group of recent grads head out on a late night drive for grub, hoping to enjoy one final hangout before their paths diverge. Instead, they accidentally turn onto a never-ending, two-lane hellscape surrounded by untold horrors and cosmic forces beyond their understanding. Cramped together inside a Jeep Cherokee and with the miles stretching infinitely ahead, they face a choice...