When bridezilla-to-be Zara’s hen-do is interrupted by the end of the world, she and her four fellow working-class West Midlander best mates wait out the breakdown of human civilisation in an isolated holiday cottage in Wales. Emerging from quarantine into the harsh new post-apocalyptic world, the dysfunctional friends find the male population has almost entirely wiped out and Britain is now a hellscape in which only the very fittest will survive.