A disillusioned diner waitress decides to take matters into her own hands with rude customers and deal with them how she's always been told - kill them with kindness.

Olive works as a game designer in America and struggles at work to develop a high-tech game concept, but her boss insists on his own idea of product development. Meanwhile, it turns out that her Hungarian grandmother, Magdalena, can't go to her for Christmas, so Olive travels to Pécs to take her with her.