You see the people you work with every day; but what can't you see? Amira, Sarah, Paula, Ewan and Charlie have worked together for years - they know how each other likes their coffee, whose love life is a mess, whose children keep them up at night. But their comfortable routine life is suddenly shattered when an aggressive new boss walks in... Now, there's something chilling in the air. Who secretly hates everyone? Who is tortured by their past? Who is capable of murder?