《谁在那？探索未知的神秘存在》灰毛衣现在在哪还能看啊

　　Everyone knows the feeling of anxiety when a stranger knocks on the door. Is it worth it to open? Who's there? A billionaire, an airplane pilot, a police trainee, a young mother and her daughter find themselves in the face of the unknown, they have to look beyond, and most importantly, inside themselves to understand what they are really afraid of.