News breaks of a deadly virus in Asia but, despite fatalities, few people take it seriously. Sheltered within their university bubble, Samantha and Louise are convinced the UK is invulnerable to this threat, until gruesome events unfold around the world and the death toll rises from hundreds to millions. By the time the virus reaches England and students on campus start falling sick, Samantha has to weigh up the risks of travelling home to London. She decides to sit tight with Louise and wait for everything to blow over. But the situation further deteriorates in ways the two friends couldn't...