Assia Valentine is a 16-year-old, quiet, self-sufficient girl. One day, when she comes home from school, she finds her parents in a shocking state, dead, so to speak. Assia is trying to find some solution to the situation as the world gradually descends into chaos. She has only one goal in mind: to find an antidote that will solve her parents' problems at once, reverse the apocalypse, and then return to her own introverted world.